Kawahara; Masataka

Patent Applications and Registrations

Patent applications and USPTO patent grants for Kawahara; Masataka.The latest application filed is for "electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus".

Company Profile

3.53.66

Kawahara; Masataka - Mishima JP
Kawahara; Masataka - Mishima-shi JP
Kawahara; Masataka - Mishimi JP
Kawahara; Masataka - Mishimi-shi JP
Kawahara; Masataka - Shizuoka-ken JP
Kawahara, Masataka - Sunto-gun JP

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus Grant 11,249,407 - Watariguchi , et al. February 15, 2	2022-02-15
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus Grant 11,237,493 - Makisumi , et al. February 1, 2	2022-02-01
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus Grant 11,181,837 - Sekiya , et al. November 23, 2	2021-11-23
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus Grant 11,126,097 - Ishida , et al. September 21, 2	2021-09-21
Electrophotographic Photosensitive Member, Process Cartridge And Electrophotographic Apparatus App 20200409278 - Makisumi; Kohei ; et al.	2020-12-31
Electrophotographic Photosensitive Member, Process Cartridge And Electrophotographic Apparatus App 20200409281 - Watariguchi; Kaname ; et al.	2020-12-31
Electrophotographic Photosensitive Member, Process Cartridge, And Electrophotographic Apparatus App 20200409279 - Sekiya; Michiyo ; et al.	2020-12-31
Electrophotographic Photosensitive Member, Process Cartridge, And Electrophotographic Apparatus App 20200409280 - Ishida; Tomohito ; et al.	2020-12-31
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus Grant 10,838,313 - Araki , et al. November 17, 2	2020-11-17
Electrophotographic photoconductor, process cartridge, and electrophotographic apparatus Grant 10,429,753 - Watariguchi , et al. O	2019-10-01
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus Grant 10,401,746 - Watariguchi , et al. Sep	2019-09-03
Electrophotographic Photosensitive Member, Process Cartridge, And Electrophotographic Apparatus App 20180314171 - Watariguchi; Kaname ; et al.	2018-11-01
Electrophotographic Photosensitive Member, Process Cartridge, And Electrophotographic Apparatus App 20180314170 - Araki; Kazuko ; et al.	2018-11-01
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus, and chlorogallium phthalocyanine crystal and method for producing the same Grant 10,012,915 - Nishida , et al. July 3, 2	2018-07-03
Electrophotographic photosensitive member, process cartridge, electrophotographic apparatus, and phthalocyanine pigment Grant 9,921,499 - Watariguchi , et al. March 20, 2	2018-03-20
Manufacturing method of phthalocyanine crystal by milling crystal transformation for at least 1,000 hours Grant 9,869,032 - Kawahara , et al. January 16, 2	2018-01-16
Electrophotographic photosensitive member, method for manufacturing electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus Grant 9,864,284 - Kawahara , et al. January 9, 2	2018-01-09
Electrophotographic Photosensitive Member, Process Cartridge And Electrophotographic Apparatus, And Chlorogallium Phthalocyanine Crystal And Method For Producing The Same App 20170299970 - Nishida; Tsutomu ; et al.	2017-10-19
Electrophotographic photosensitive member, method for manufacturing electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus Grant 9,753,385 - Ito , et al. September 5, 2	2017-09-05
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus, and chlorogallium phthalocyanine crystal and method for producing the same Grant 9,746,790 - Nishida , et al. August 29, 2	2017-08-29
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus, and chlorogallium phthalocyanine crystal and method for producing the same Grant 9,720,337 - Nishida , et al. August 1, 2	2017-08-01
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus Grant 9,709,907 - Watariguchi , et al. July 18, 2	2017-07-18
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus Grant 9,645,516 - Kawahara , et al. May 9, 2	2017-05-09
Electrophotographic photosensitive member and manufacturing method thereof, process cartridge and electrophotographic apparatus, and phthalocyanine crystal and manufacturing method thereof Grant 9,645,515 - Kuno , et al. May 9, 2	2017-05-09
Electrophotographic Photosensitive Member, Process Cartridge,electrophotographic Apparatus, And Phthalocyanine Pigment App 20170123330 - Watariguchi; Kaname ; et al.	2017-05-04
Manufacturing Method Of Phthalocyanine Crystal App 20170073835 - Kawahara; Masataka ; et al.	2017-03-16
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus Grant 9,563,139 - Kawahara , et al. February 7, 2	2017-02-07
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus Grant 9,541,850 - Nishida , et al. January 10, 2	2017-01-10
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus Grant 9,535,347 - Watariguchi , et al. January 3, 2	2017-01-03
Solution of gallium phthalocyanine method for preparing the same method for producing gallium phthalocyanine crystal method for purifying composition containing gallium phthalocyanine and method for producing electrophotographic photosensitive member Grant 9,535,345 - Nishida , et al. January 3, 2	2017-01-03
Electrophotographic photosensitive member, method for producing electrophotographic photosensitive member, process cartridge and electrophotographic apparatus, and hydroxygallium phthalocyanine crystal Grant 9,519,232 - Kawahara , et al. December 13, 2	2016-12-13
Electrophotographic photosensitive member, process cartridge, electrophotographic apparatus, and gallium phthalocyanine crystal Grant 9,459,542 - Tanaka , et al. October 4, 2	2016-10-04
Electrophotographic photosensitive member, manufacturing method of electrophotographic photosensitive member, process cartridge and electrophotographic apparatus, and a solid solution and manufacturing method of a solid solution Grant 9,459,545 - Tanaka , et al. October 4, 2	2016-10-04
Electrophotographic photosensitive member and manufacturing method therefor, process cartridge and electrophotographic apparatus including the electrophotographic photosensitive member, and phthalocyanine crystal and method producing therefor Grant 9,436,106 - Kuno , et al. September 6, 2	2016-09-06
Electrophotographic Photosensitive Member, Method For Manufacturing Electrophotographic Photosensitive Member, Process Cartridge, And Electrophotographic Apparatus App 20160252830 - Ito; Yota ; et al.	2016-09-01
Electrophotographic Photoconductor, Process Cartridge, And Electrophotographic Apparatus App 20160252834 - Watariguchi; Kaname ; et al.	2016-09-01
Electrophotographic Photosensitive Member, Process Cartridge, And Electrophotographic Apparatus App 20160252833 - Kumoi; Hirofumi ; et al.	2016-09-01
Electrophotographic Photosensitive Member, Method For Manufacturing Electrophotographic Photosensitive Member, Process Cartridge, And Electrophotographic Apparatus App 20160252829 - Kawahara; Masataka ; et al.	2016-09-01
Electrophotographic Photosensitive Member, Method For Manufacturing The Same, Electrophotographic Apparatus, Process Cartridge, And Chlorogallium Phthalocyanine Crystal App 20160216620 - Nishida; Tsutomu ; et al.	2016-07-28
Electrophotographic Photosensitive Member, Process Cartridge And Electrophotographic Apparatus App 20160154328 - Kumoi; Hirofumi ; et al.	2016-06-02
Electrophotographic Photosensitive Member, Method For Producing Electrophotographic Photosensitive Member, Process Cartridge And Electrophotographic Apparatus App 20160154326 - Kumoi; Hirofumi ; et al.	2016-06-02
Electrophotographic Photosensitive Member, Process Cartridge And Electrophotographic Apparatus App 20160139516 - Kawahara; Masataka ; et al.	2016-05-19
Electrophotographic photosensitive member, method for manufacturing the same, electrophotographic apparatus, process cartridge, and hydroxygallium phthalocyanine crystal Grant 9,341,965 - Nishida , et al. May 17, 2	2016-05-17
Electrophotographic Photosensitive Member, Process Cartridge, And Electrophotographic Apparatus App 20160131985 - Tanaka; Masato ; et al.	2016-05-12
Electrophotographic Photosensitive Member, Process Cartridge And Electrophotographic Apparatus, And Chlorogallium Phthalocyanine Crystal And Method For Producing The Same App 20160124326 - Nishida; Tsutomu ; et al.	2016-05-05
Electrophotographic Photosensitive Member, Process Cartridge And Electrophotographic Apparatus App 20160124328 - Kawahara; Masataka ; et al.	2016-05-05
Electrophotographic Photosensitive Member, Process Cartridge And Electrophotographic Apparatus, And Chlorogallium Phthalocyanine Crystal And Method For Producing The Same App 20160124325 - Nishida; Tsutomu ; et al.	2016-05-05
Electrophotographic Photosensitive Member, Process Cartridge And Electrophotographic Apparatus, And Chlorogallium Phthalocyanine Crystal And Method For Producing The Same App 20160124329 - Nishida; Tsutomu ; et al.	2016-05-05
Electrophotographic Photosensitive Member, Process Cartridge, Electrophotographic Apparatus And Phthalocyanine Crystal App 20160091807 - Tanaka; Masato ; et al.	2016-03-31
Electrophotographic photosensitive member, method for manufacturing electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus Grant 9,298,115 - Kuno , et al. March 29, 2	2016-03-29
Electrophotographic Photosensitive Member, Manufacturing Method Of Electrophotographic Photosensitive Member, Process Cartridge And Electrophotographic Apparatus, And A Solid Solution And Manufacturing Method Of A Solid Solution App 20150370181 - Tanaka; Masato ; et al.	2015-12-24
Electrophotographic Photosensitive Member, Process Cartridge And Electrophotographic Apparatus App 20150362848 - Watariguchi; Kaname ; et al.	2015-12-17
Electrophotographic Photosensitive Member, Process Cartridge And Electrophotographic Apparatus App 20150362847 - Tanaka; Masato ; et al.	2015-12-17
Electrophotographic Photosensitive Member, Method For Producing The Same, Electrophotographic Apparatus And Process Cartridge, And Chlorogallium Phthalocyanine Crystal App 20150362849 - Nishida; Tsutomu ; et al.	2015-12-17
Electrophotographic Photosensitive Member, Manufacturing Method Of Electrophotographic Photosensitive Member, Process Cartridge And Electrophotographic Apparatus, And Phthalocyanine Crystal And Manufacturing Method Of Phthalocyanine Crystal App 20150346616 - Kawahara; Masataka ; et al.	2015-12-03
Electrophotographic Photosensitive Member, Manufacturing Method Of Electrophotographic Photosensitive Member, Process Cartridge And Electrophotographic Apparatus, And Phthalocyanine Crystal And Manufacturing Method Of Phthalocyanine Crystal App 20150346617 - Kawahara; Masataka ; et al.	2015-12-03
Electrophotographic Photosensitive Member And Manufacturing Method Therefor, Process Cartridge And Electrophotographic Apparatus Including The Electrophotographic Photosensitive Member, And Phthalocyanine Crystal And Method Producing Therefor App 20150316862 - Kuno; Junpei ; et al.	2015-11-05
Electrophotographic Photosensitive Member And Manufacturing Method Thereof, Process Cartridge And Electrophotographic Apparatus, And Phthalocyanine Crystal And Manufacturing Method Thereof App 20150316864 - Kuno; Junpei ; et al.	2015-11-05
Electrophotographic Photosensitive Member, Process Cartridge And Electrophotographic Apparatus, And Gallium Phthalocyanine Crystal App 20150316863 - Tanaka; Masato ; et al.	2015-11-05
Electrophotographic Photosensitive Member, Process Cartridge, And Electrophotographic Apparatus App 20150309426 - Nishida; Tsutomu ; et al.	2015-10-29
Electrophotographic Photosensitive Member, Method For Producing Electrophotographic Photosensitive Member, Process Cartridge And Electrophotographic Apparatus, Phthalocyanine Crystal, And Method For Producing Phthalocyanine Crystal App 20150309428 - Kawahara; Masataka ; et al.	2015-10-29
Electrophotographic Photosensitive Member, Method For Producing Electrophotographic Photosensitive Member, Process Cartridge And Electrophotographic Apparatus, And Hydroxygallium Phthalocyanine Crystal App 20150309427 - Kawahara; Masataka ; et al.	2015-10-29
Solution Of Gallium Phthalocyanine Method For Preparing The Same Method For Producing Gallium Phthalocyanine Crystal Method For Purifying Composition Containing Gallium Phthalocyanine And Method For Producing Electrophotographic Photosensitive Member App 20150234298 - Nishida; Tsutomu ; et al.	2015-08-20
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus Grant 9,104,098 - Nishida , et al. August 11, 2	2015-08-11
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus Grant 9,086,640 - Nishida , et al. July 21, 2	2015-07-21
Method of producing gallium phthalocyanine crystal and method of producing electrophotographic photosensitive member using the method of producing gallium phthalocyanine crystal Grant 9,068,083 - Tanaka , et al. June 30, 2	2015-06-30
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus Grant 9,057,969 - Nishida , et al. June 16, 2	2015-06-16
Electrophotographic Photosensitive Member, Method For Manufacturing The Same, Electrophotographic Apparatus, Process Cartridge, And Hydroxygallium Phthalocyanine Crystal App 20150147691 - Nishida; Tsutomu ; et al.	2015-05-28
Solution of gallium phthalocyanine method for preparing the same method for producing gallium phthalocyanine crystal method for purifying composition containing gallium phthalocyanine and method for producing electrophotographic photosensitive member Grant 9,040,218 - Nishida , et al. May 26, 2	2015-05-26
Electrophotographic photosensitive member, method for producing the same, process cartridge, and electrophotographic apparatus Grant 8,993,204 - Nonaka , et al. March 31, 2	2015-03-31
Electrophotographic photosensitive member, method of producing phthalocyanine crystal, method of producing electrophotographic photosensitive member, process cartridge, electrophotographic apparatus, and phthalocyanine crystal Grant 8,974,991 - Kawahara , et al. March 10, 2	2015-03-10
Electrophotographic Photosensitive Member, Process Cartridge And Electrophotographic Apparatus App 20140363759 - Watariguchi; Kaname ; et al.	2014-12-11
Electrophotographic Photosensitive Member, Method For Manufacturing Electrophotographic Photosensitive Member, Process Cartridge, And Electrophotographic Apparatus App 20140322637 - Kuno; Junpei ; et al.	2014-10-30
Electrophotographic Photosensitive Member, Process Cartridge, Electrophotographic Apparatus, And Gallium Phthalocyanine Crystal App 20140308606 - Tanaka; Masato ; et al.	2014-10-16
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus Grant 8,841,052 - Watariguchi , et al. September 23, 2	2014-09-23
Electrophotographic Photosensitive Member, Process Cartridge, And Electrophotographic Apparatus App 20140212801 - Nishida; Tsutomu ; et al.	2014-07-31
Solution Of Gallium Phthalocyanine Method For Preparing The Same Method For Producing Gallium Phthalocyanine Crystal Method For Purifying Composition Containing Gallium Phthalocyanine And Method For Producing Electrophotographic Photosensitive Member App 20140212804 - Nishida; Tsutomu ; et al.	2014-07-31
Electrophotographic Photosensitive Member, Process Cartridge And Electrophotographic Apparatus App 20140141362 - Watariguchi; Kaname ; et al.	2014-05-22
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus Grant 8,703,372 - Murakami , et al. April 22, 2	2014-04-22
Electrophotographic Photosensitive Member, Process Cartridge, And Electrophotographic Apparatus App 20140065530 - Nishida; Tsutomu ; et al.	2014-03-06
Electrophotographic Photosensitive Member, Process Cartridge, And Electrophotographic Apparatus App 20140065531 - Nishida; Tsutomu ; et al.	2014-03-06
Method Of Producing Gallium Phthalocyanine Crystal And Method Of Producing Electrophotographic Photosensitive Member Using The Method Of Producing Gallium Phthalocyanine Crystal App 20130137032 - Tanaka; Masato ; et al.	2013-05-30
Electrophotographic Photosensitive Member, Process Cartridge And Electrophotographic Apparatus App 20130137023 - Watariguchi; Kaname ; et al.	2013-05-30
Electrophotographic Photosensitive Member, Method Of Producing Phthalocyanine Crystal, Method Of Producing Electrophotographic Photosensitive Member, Process Cartridge, Electrophotographic Apparatus, And Phthalocyanine Crystal App 20130137025 - Kawahara; Masataka ; et al.	2013-05-30
Electrophotographic Photosensitive Member, Process Cartridge, And Electrophotographic Apparatus App 20130137026 - Murakami; Takeshi ; et al.	2013-05-30
Polyvinyl acetal resin, electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus Grant 8,088,541 - Tanaka , et al. January 3, 2	2012-01-03
Electrophotographic Photosensitive Member, Method For Producing The Same, Process Cartridge, And Electrophotographic Apparatus App 20110129768 - Nonaka; Masaki ; et al.	2011-06-02
Image forming method, and electrophotographic apparatus making use of the image forming method Grant 7,749,667 - Kawahara , et al. July 6, 2	2010-07-06
Electrophotographic photosensitive member with depressed portions, process cartridge holding the electrophotographic photosensitive member and electrophotographic apparatus with the electrophotographic photosensitive member Grant 7,718,331 - Uematsu , et al. May 18, 2	2010-05-18
Method for preparing electrophotographic photosensitive member Grant 7,629,102 - Ochi , et al. December 8, 2	2009-12-08
Process for producing electrophotographic photosensitive member Grant 7,622,238 - Uematsu , et al. November 24, 2	2009-11-24
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus Grant 7,556,901 - Anezaki , et al. July 7, 2	2009-07-07
Process For Producing Electrophotographic Photosensitive Member App 20090170023 - Shimada; Akira ; et al.	2009-07-02
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus Grant 7,551,878 - Ogaki , et al. June 23, 2	2009-06-23
Polyvinyl Acetal Resin, Electrophotographic Photosensitive Member, Process Cartridge, And Electrophotographic Apparatus App 20090123176 - Tanaka; Masato ; et al.	2009-05-14
Method For Preparing Electrophotographic Photosensitive Member App 20090023091 - Ochi; Atsushi ; et al.	2009-01-22
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus Grant 7,452,644 - Tanaka , et al. November 18, 2	2008-11-18
Electrophotographic Photosensitive Member, Process Cartridge, And Electrophotographic Apparatus App 20080124126 - Anezaki; Takashi ; et al.	2008-05-29
Electrophotographic Photosensitive Member, Process Cartridge, And Electrophotographic Apparatus App 20080124637 - Uematsu; Hiroki ; et al.	2008-05-29
Process For Producing Electrophotographic Photosensitive Member App 20080096123 - Shimada; Akira ; et al.	2008-04-24
Electrophotographic photosensitive member, and process cartridge and electrophotographic apparatus which have the electrophotographic photosensitive member Grant 7,333,752 - Kawahara , et al. February 19, 2	2008-02-19
Electrophotographic Photosensitive Member, Process Cartridge, And Electrophotographic Apparatus App 20080019735 - Ogaki; Harunobu ; et al.	2008-01-24
Process For Producing Electrophotographic Photosensitive Member App 20070281239 - Uematsu; Hiroki ; et al.	2007-12-06
Image Forming Method, And Electrophotographic Apparatus Making Use Of The Image Forming Method App 20070254232 - Kawahara; Masataka ; et al.	2007-11-01
Electrophotographic apparatus and process cartridge Grant 7,160,659 - Uesugi , et al. January 9, 2	2007-01-09
Electrophotographic photosensitive member, and process cartridge and electrophotographic apparatus which have the electrophotographic photosensitive member App 20070003851 - Kawahara; Masataka ; et al.	2007-01-04
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus Grant 7,097,950 - Tanaka , et al. August 29, 2	2006-08-29
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus App 20060172208 - Tanaka; Masato ; et al.	2006-08-03
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus App 20050282076 - Tanaka, Masato ; et al.	2005-12-22
Electrophotographic apparatus and process cartridge App 20050185987 - Uesugi, Hirotoshi ; et al.	2005-08-25
Electrophotographic photosensitive member, process for production thereof, process cartridge and electrophotographic apparatus Grant 6,623,899 - Takaya , et al. September 23, 2	2003-09-23
Transfer sheet and image-forming method Grant 6,558,861 - Ito , et al. May 6, 2	2003-05-06
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus App 20020039695 - Takaya, Itaru ; et al.	2002-04-04
Electrophotographic photosensitive member, process for production thereof, process cartridge and electrophotographic apparatus App 20020039696 - Takaya, Itaru ; et al.	2002-04-04
Transfer sheet and image-forming method App 20010031408 - Ito, Nobuyuki ; et al.	2001-10-18
Electrophotographic photosensitive member, a process-cartridge inclusive thereof, and an image forming apparatus Grant 6,296,978 - Takaya , et al. October 2, 2	2001-10-02
Electrophotographic photosensitive member, and process cartridge and electrophotographic photosensitive member Grant 6,258,498 - Kawahara , et al. July 10, 2	2001-07-10
Electrophotographic photosensitive member, and electrophotographic apparatus and process cartridge employing the same Grant 5,910,386 - Yoshinaga , et al. June 8, 1	1999-06-08