Yokoyama; Norimasa

Patent Applications and Registrations

Patent applications and USPTO patent grants for Yokoyama; Norimasa.The latest application filed is for "organic electroluminescence device".

Company Profile

11.76.81

Yokoyama; Norimasa - Tokyo JP
Yokoyama; Norimasa - Tasukuba N/A JP
Yokoyama; Norimasa - Tsukuba N/A JP
Yokoyama; Norimasa - Ibaraki JP
YOKOYAMA; Norimasa - Tsukuba-shi JP
Yokoyama; Norimasa - Yamaguchi 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
Organic electroluminescence device Grant 11,056,653 - Yokoyama , et al. July 6, 2	2021-07-06
Organic electroluminescent device Grant 10,818,844 - Yokoyama , et al. October 27, 2	2020-10-27
Organic Electroluminescence Device App 20200328353 - YOKOYAMA; NORIMASA ; et al.	2020-10-15
Compound having substituted triphenylene ring structure, and organic electroluminescent device Grant 10,797,242 - Adachi , et al. October 6, 2	2020-10-06
Organic electroluminescent device Grant 10,593,884 - Yokoyama , et al.	2020-03-17
Pyrimidine derivative and organic electroluminescent devices Grant 10,566,543 - Yokoyama , et al. Feb	2020-02-18
Compound having substituted bipyridyl group and pyridoinodole ring structure, and organic electroluminescent device Grant 10,541,369 - Yokoyama , et al. Ja	2020-01-21
Organic electroluminescence device Grant 10,505,119 - Yokoyama , et al. Dec	2019-12-10
Organic electroluminescent device Grant 10,497,876 - Yokoyama , et al. De	2019-12-03
Organic Electroluminescent Device App 20190115542 - Yokoyama; Norimasa ; et al.	2019-04-18
Organic Electroluminescence Element App 20190051838 - YOKOYAMA; NORIMASA ; et al.	2019-02-14
Pyrimidine derivatives and organic electroluminescent devices Grant 10,096,779 - Yokoyama , et al. October 9, 2	2018-10-09
Compound having triphenylsilyl group and triarylamine structure, and organic electroluminescent device Grant 10,059,725 - Yokoyama , et al. August 28, 2	2018-08-28
Compound having substituted triphenylene ring structure, and organic electroluminescent device Grant 10,026,903 - Adachi , et al. July 17, 2	2018-07-17
Indenoindole derivative and organic electroluminescent element Grant 9,985,216 - Nagaoka , et al. May 29, 2	2018-05-29
Compound having acridan ring structure, and organic electroluminescent device Grant 9,905,770 - Yokoyama , et al. February 27, 2	2018-02-27
Organic Electroluminescence Device App 20180026198 - YOKOYAMA; Norimasa ; et al.	2018-01-25
Organic Electroluminescent Device App 20180006235 - Yokoyama; Norimasa ; et al.	2018-01-04
Pyrimidine Derivative And Organic Electroluminescent Devices App 20180006239 - YOKOYAMA; Norimasa ; et al.	2018-01-04
Organic Electroluminescent Device App 20170346009 - Yokoyama; Norimasa ; et al.	2017-11-30
Compound Having Substituted Triphenylene Ring Structure, And Organic Electroluminescent Device App 20170338417 - Adachi; Chihaya ; et al.	2017-11-23
Compound having acridan ring structure, and organic electroluminescent device Grant 9,818,949 - Yokoyama , et al. November 14, 2	2017-11-14
Compound Having Substituted Triphenylene Ring Structure, And Organic Electroluminescent Device App 20170271595 - Adachi; Chihaya ; et al.	2017-09-21
Compound having substituted anthracene ring structure and pyridoindole ring structure, and organic electroluminescent device Grant 9,755,152 - Yokoyama , et al. September 5, 2	2017-09-05
Compound having carbazole ring structure, and organic electroluminescent device Grant 9,732,036 - Yokoyama , et al. August 15, 2	2017-08-15
Phosphorescent organic light emitting devices having a hole transporting cohost material in the emissive region Grant 9,705,099 - Adamovich , et al. July 11, 2	2017-07-11
Phosphorescent organic light emitting devices combined with hole transport material having high operating stability Grant 9,705,092 - Yamamoto , et al. July 11, 2	2017-07-11
Organic Electroluminescent Device App 20170179398 - YOKOYAMA; Norimasa ; et al.	2017-06-22
Compound having substituted triphenylene ring structure, and organic electroluminescent device Grant 9,685,612 - Adachi , et al. June 20, 2	2017-06-20
Organic Electroluminescent Device App 20170117481 - Kabasawa; Naoaki ; et al.	2017-04-27
Compounds having bipyridyl group and carbazole ring, and organic electroluminescent element Grant 9,634,258 - Yokoyama , et al. April 25, 2	2017-04-25
Compound having an indolocarbazole ring structure and organic electroluminescent device Grant 9,564,600 - Yokoyama , et al. February 7, 2	2017-02-07
Organic electroluminescent device Grant 9,553,272 - Yokoyama , et al. January 24, 2	2017-01-24
Arylamine compound useful in an organic electroluminescent device Grant 9,525,140 - Yokoyama , et al. December 20, 2	2016-12-20
Organic electroluminescent device Grant 9,444,055 - Yokoyama , et al. September 13, 2	2016-09-13
Dicarbazole Derivatives And Organic Electroluminescent Devices App 20160155955 - YOKOYAMA; Norimasa ; et al.	2016-06-02
Organic Electroluminescent Device App 20160126464 - Yokoyama; Norimasa ; et al.	2016-05-05
Indenoindole Derivative And Organic Electroluminescent Element App 20160126468 - NAGAOKA; Makoto ; et al.	2016-05-05
Organic Electroluminescent Device App 20160118591 - Yokoyama; Norimasa ; et al.	2016-04-28
Organic electroluminescent device Grant 9,306,174 - Yokoyama , et al. April 5, 2	2016-04-05
Organic electroluminescent device Grant 9,306,175 - Yokoyama , et al. April 5, 2	2016-04-05
Novel Pyrimidine Derivatives And Organic Electroluminescent Devices App 20160087215 - YOKOYAMA; Norimasa ; et al.	2016-03-24
Method of producing aromatic amino compounds Grant 9,238,624 - Yokoyama , et al. January 19, 2	2016-01-19
Organic Electroluminescent Device App 20150380657 - Yokoyama; Norimasa ; et al.	2015-12-31
Compound having triphenylamine structure, and organic electroluminescent device Grant 9,196,839 - Yokoyama , et al. November 24, 2	2015-11-24
Compound having indenocarbazole ring structure, and organic electroluminescent device Grant 9,196,837 - Yokoyama , et al. November 24, 2	2015-11-24
Compound Having Indenoacridan Ring Structure, And Organic Electroluminescent Device App 20150249218 - Yokoyama; Norimasa ; et al.	2015-09-03
Benzotriazole derivatives and organic electroluminescent devices using the derivatives Grant 9,123,897 - Yokoyama , et al. September 1, 2	2015-09-01
Compound Having Substituted Anthracene Ring Structure And Pyridoindole Ring Structure, And Organic Electroluminescent Device App 20150155496 - Yokoyama; Norimasa ; et al.	2015-06-04
Compound having benzotriazole ring structure and organic electroluminescent element Grant 9,005,776 - Yokoyama , et al. April 14, 2	2015-04-14
Compound Having Acridan Ring Structure, And Organic Electroluminescent Device App 20150060803 - Yokoyama; Norimasa ; et al.	2015-03-05
Compound Having Acridan Ring Structure, And Organic Electroluminescent Device App 20150048351 - Yokoyama; Norimasa ; et al.	2015-02-19
Novel Triphenylene Derivatives And Organic Electroluminescent Devices Using Said Derivatives App 20150034924 - Yokoyama; Norimasa ; et al.	2015-02-05
Compound having substituted anthracene ring structure and pyridoindole ring structure, and organic electroluminescent device Grant 8,927,119 - Yokoyama , et al. January 6, 2	2015-01-06
Phosphorescent Organic Light Emitting Devices Having A Hole Transporting Cohost Material In The Emissive Region App 20140374728 - Adamovich; Vadim ; et al.	2014-12-25
Novel Benzotriazole Derivatives And Organic Electroluminescent Devices Using The Derivatives App 20140374721 - Yokoyama; Norimasa ; et al.	2014-12-25
Phosphorescent Organic Light Emitting Devices Combined With Hole Transport Material Having High Operating Stability App 20140339518 - Yamamoto; Hitoshi ; et al.	2014-11-20
Compound having acridan ring structure, and organic electroluminescent device Grant 8,852,759 - Yokoyama , et al. October 7, 2	2014-10-07
Organic Electroluminescent Device App 20140225100 - Yokoyama; Norimasa ; et al.	2014-08-14
Organic electroluminescent device Grant 8,771,841 - Yokoyama , et al. July 8, 2	2014-07-08
Method Of Producing Aromatic Amino Compounds App 20140163232 - YOKOYAMA; Norimasa ; et al.	2014-06-12
Compound having a substituted anthracene ring structure and pyridoindole ring structure, and organic electroluminescent device Grant 8,748,014 - Yokoyama , et al. June 10, 2	2014-06-10
Method of producing aromatic amino compounds Grant 8,735,626 - Yokoyama , et al. May 27, 2	2014-05-27
Compound having pyridoindole ring structure having substituted pyridyl group attached thereto, and organic electroluminescence element Grant 8,722,209 - Yokoyama , et al. May 13, 2	2014-05-13
Compound Having An Indolocarbazole Ring Structure And Organic Electroluminescent Device App 20140124756 - Yokoyama; Norimasa ; et al.	2014-05-08
Organic electroluminescent device containing arylamine compound and bipyridyl compound Grant 8,716,698 - Yokoyama , et al. May 6, 2	2014-05-06
Compound Having Triazole Ring Structure Substituted With Pyridyl Group And Organic Electroluminescent Device App 20140048787 - MIKI; Tetsuzo ; et al.	2014-02-20
Compound Having Acridan Ring Structure, And Organic Electroluminescent Device App 20140042425 - Yokoyama; Norimasa ; et al.	2014-02-13
Arylamine Compound Useful In An Organic Electroluminescent Device App 20140039221 - YOKOYAMA; Norimasa ; et al.	2014-02-06
Compound Having Substituted Triphenylene Ring Structure, And Organic Electroluminescent Device App 20140034936 - Adachi; Chihaya ; et al.	2014-02-06
Substituted bipyridyl compound and organic electroluminescent device Grant 8,642,189 - Yokoyama , et al. February 4, 2	2014-02-04
Organic Electroluminescent Device App 20140021451 - Yokoyama; Norimasa ; et al.	2014-01-23
Compound having pyridoindole ring structure bonded with substituted pyridyl group, and organic electroluminescent device Grant 8,624,228 - Yokoyama , et al. January 7, 2	2014-01-07
Compound Having Substituted Anthracene Ring Structure And Pyridoindole Ring Structure And Organic Electroluminescence Device App 20130341604 - YOKOYAMA; Norimasa ; et al.	2013-12-26
Compounds Having Bipyridyl Group And Carbazole Ring, And Organic Electroluminescent Element App 20130328041 - Yokoyama; Norimasa ; et al.	2013-12-12
Organic Electroluminescent Device App 20130328040 - Yokoyama; Norimasa ; et al.	2013-12-12
Compound having substituted anthracene ring structure and pyridoindole ring structure and organic electroluminescence device Grant 8,586,210 - Yokoyama , et al. November 19, 2	2013-11-19
Compound Having Substituted Bipyridyl Group And Pyridoinodole Ring Structure, And Organic Electroluminescent Device App 20130292663 - Yokoyama; Norimasa ; et al.	2013-11-07
Compound Having Triazole Ring Structure Substituted With Pyridyl Group And Organic Electroluminescent Device App 20130285025 - MIKI; Tetsuzo ; et al.	2013-10-31
Compound Having Indenocarbazole Ring Structure, And Organic Electroluminescent Device App 20130126856 - Yokoyama; Norimasa ; et al.	2013-05-23
Compound Having Carbazole Ring Structure, And Organic Electroluminescent Device App 20130112950 - Yokoyama; Norimasa ; et al.	2013-05-09
Compound Having Acridan Ring Structure, And Organic Electroluminescent Device App 20130075715 - Yokoyama; Norimasa ; et al.	2013-03-28
Compound having substituted pyridyl group and pyridoindole ring structure linked through phenylene group, and organic electroluminescent device Grant 8,377,573 - Yokoyama , et al. February 19, 2	2013-02-19
Substituted Pyridyl Compound And Organic Electroluminescent Element App 20120319098 - Yokoyama; Norimasa ; et al.	2012-12-20
Compound Having Pyridoindole Ring Structure Having Substituted Pyridyl Group Attached Thereto, And Organic Electroluminescence Element App 20120298969 - YOKOYAMA; Norimasa ; et al.	2012-11-29
Compound Having Triphenylamine Structure, And Organic Electroluminescent Device App 20120292609 - Yokoyama; Norimasa ; et al.	2012-11-22
Organic Electroluminescent Device App 20120273767 - Yokoyama; Norimasa ; et al.	2012-11-01
Compound Having A Substituted Anthracene Ring Structure And Pyridoindole Ring Structure, And Organic Electroluminescent Device App 20120228598 - Yokoyama; Norimasa ; et al.	2012-09-13
Compound wherein substituted bipyridyl group is connected with pyridoindole ring structure through phenylene group, and organic electroluminescent device Grant 8,252,431 - Yokoyama , et al. August 28, 2	2012-08-28
Compound having oxadiazole ring structure bonded with aromatic heterocyclic ring and organic electroluminescent device Grant 8,247,087 - Miki , et al. August 21, 2	2012-08-21
Organic Electroluminescent Device App 20120205642 - Yokoyama; Norimasa ; et al.	2012-08-16
Arylamine compound and organic electroluminescence device Grant 8,227,096 - Miki , et al. July 24, 2	2012-07-24
Compound Having Carbazole Ring Structure, And Organic Electroluminescent Device App 20120175599 - Yokoyama; Norimasa ; et al.	2012-07-12
Organic Electroluminescent Device App 20120161107 - Yokoyama; Norimasa ; et al.	2012-06-28
Compound Having Substituted Anthracene Ring Structure And Pyridoindole Ring Structure, And Organic Electroluminescent Device App 20120126220 - Yokoyama; Norimasa ; et al.	2012-05-24
Compound having pyridoindole ring structure having substituted pyridyl group attached thereto, and organic electroluminescence element Grant 8,168,308 - Yokoyama , et al. May 1, 2	2012-05-01
Compound having thiadiazole ring structure substituted with pyridyl group and organic electroluminescent device Grant 8,153,277 - Yokoyama , et al. April 10, 2	2012-04-10
Compound Having Benzotriazole Ring Structure And Organic Electroluminescent Element App 20120012831 - Yokoyama; Norimasa ; et al.	2012-01-19
Compound Having Triazole Ring Structure To Which Pyridyl Group Is Bonded, And Organic Electroluminescent Device App 20110272679 - Yokoyama; Norimasa ; et al.	2011-11-10
m-carbazolylphenyl compounds Grant 8,053,092 - Miki , et al. November 8, 2	2011-11-08
Method Of Producing Aromatic Amino Compounds App 20110257404 - Yokoyama; Norimasa ; et al.	2011-10-20
Compound Having Triphenylsilyl Group And Triarylamine Structure, And Organic Electroluminescent Device App 20110220881 - Yokoyama; Norimasa ; et al.	2011-09-15
Compound Having Substituted Anthracene Ring Structure And Pyridoindole Ring Structure And Organic Electroluminescence Device App 20110175079 - Yokoyama; Norimasa ; et al.	2011-07-21
Process for producing N,N'-carbonyldiimidazole Grant 7,964,626 - Aoki , et al. June 21, 2	2011-06-21
Arylamine Compound And Organic Electroluminescence Device App 20110133171 - Miki; Tetsuzo ; et al.	2011-06-09
Organic Electroluminescent Device App 20110073852 - Yokoyama; Norimasa ; et al.	2011-03-31
Compound Having Substituted Pyridyl Group And Pyridoindole Ring Structure Linked Through Phenylene Group, And Organic Electroluminescent Device App 20110006291 - Yokoyama; Norimasa ; et al.	2011-01-13
Arylamine compound and organic electroluminescence device Grant 7,867,632 - Miki , et al. January 11, 2	2011-01-11
Substituted Bipyridyl Compound And Organic Electroluminescent Device App 20110001129 - Yokoyama; Norimasa ; et al.	2011-01-06
Compound Having Pyridoindole Ring Structure Bonded With Substituted Pyridyl Group, And Organic Electroluminescent Device App 20100308322 - Yokoyama; Norimasa ; et al.	2010-12-09
Compound Having Pyridoindole Ring Structure Having Substituted Pyridyl Group Attached Thereto, And Organic Electroluminescence Element App 20100230660 - Yokoyama; Norimasa ; et al.	2010-09-16
Compound Wherein Substituted Bipyridyl Group Is Connected With Pyridoindole Ring Structure Through Phenylene Group, And Organic Electroluminescent Device App 20100123388 - Yokoyama; Norimasa ; et al.	2010-05-20
Compound Having Triazine Ring Structure Substituted With Pyridyl Group And Organic Electroluminescent Device App 20100090588 - Yokoyama; Norimasa ; et al.	2010-04-15
Arylamine Compound And Organic Electroluminescence Device App 20090278442 - Miki; Tetsuzo ; et al.	2009-11-12
Compound Having Oxadiazole Ring Structure Bonded With Aromatic Heterocyclic Ring And Organic Electroluminescent Device App 20090230849 - Miki; Tetsuzo ; et al.	2009-09-17
Compound Having Thiadiazole Ring Structure Substituted With Pyridyl Group And Organic Electroluminescent Device App 20090108750 - Yokoyama; Norimasa ; et al.	2009-04-30
Compound Having Triazole Ring Structure Substituted With Pyridyl Group And Organic Electroluminescent Device App 20090102361 - Miki; Tetsuzo ; et al.	2009-04-23
Process For Producing N,N'-Carbonyldiimidazole App 20090088575 - Aoki; Yoshikazu ; et al.	2009-04-02
M-carbazolylphenyl Compounds App 20090045726 - Miki; Tetsuzo ; et al.	2009-02-19