Klesczewski; Bert

Patent Applications and Registrations

Patent applications and USPTO patent grants for Klesczewski; Bert.The latest application filed is for "flame retardant soft ether foams".

Company Profile

4.19.39

Klesczewski; Bert - Cologne DE
Klesczewski; Bert - Koln DE
Klesczewski; Bert - Koeln DE
Klesczewski; Bert - Dusseldorf DE

*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
Polyurethane foams based on polyethercarbonate polyols Grant 11,345,775 - Klesczewski , et al. May 31, 2	2022-05-31
Process for the preparation of polyether polyols Grant 11,130,842 - Hofmann , et al. September 28, 2	2021-09-28
Flame retardant soft ether foams App 20200407500 - Klesczewski; Bert ; et al.	2020-12-31
Use of alcohols which contain at least two urethane groups for producing polyether carbonate polyols Grant 10,519,276 - Rauwald , et al. Dec	2019-12-31
Use of alcohols containing at least two urethane groups for preparation of polyether polyols Grant 10,487,175 - Hofmann , et al. Nov	2019-11-26
Polyurethane foams based on polyether carbonate polyols Grant 10,233,298 - Klesczewski , et al.	2019-03-19
Process For The Preparation Of Polyether Polyols App 20190002634 - Hofmann; Jorg ; et al.	2019-01-03
Polyurethane Foams Based On Polyether Carbonate Polyols App 20180327537 - GOSSNER; Matthaus ; et al.	2018-11-15
Use Of Alcohols Containing At Least Two Urethane Groups For Preparation Of Polyether Polyols App 20180312632 - Hofmann; Jorg ; et al.	2018-11-01
Mixtures of polyether carbonate polyols and polyether polyols for producing polyurethane soft foams Grant 10,106,641 - Klesczewski , et al. October 23, 2	2018-10-23
Use Of Alcohols Which Contain At Least Two Urethane Groups For Producing Polyether Carbonate Polyols App 20180291149 - Rauwald; Urs ; et al.	2018-10-11
Polyurethane Foams Based On Polyethercarbonate Polyols App 20180273674 - Klesczewski; Bert ; et al.	2018-09-27
Polyurethane Foams Based On Polyether Carbonate Polyols App 20180265623 - Klesczewski; Bert ; et al.	2018-09-20
Method For Producing Flexible Polyester Urethane Foams With Increased Compressive Strength App 20180223030 - KLESCZEWSKI; Bert ; et al.	2018-08-09
Use of urethane alcohols for preparing polyether carbonate polyols Grant 9,957,352 - Hofmann , et al. May 1, 2	2018-05-01
Viscoelastic Flexible Polyurethane Foams Based On Polyether Carbonate Polyols App 20180044464 - Klesczewski; Bert ; et al.	2018-02-15
Use of urethane alcohols for preparation of polyether polyols Grant 9,714,216 - Hofmann , et al. July 25, 2	2017-07-25
Polyurethane Foams Based On Polyether Carbonate Polyols App 20170044341 - KLESCZEWSKI; Bert ; et al.	2017-02-16
Use Of Urethane Alcohols For Preparing Polyether Carbonate Polyols App 20160319070 - HOFMANN; Jorg ; et al.	2016-11-03
Mixtures Of Polyether Carbonate Polyols And Polyether Polyols For Producing Polyurethane Soft Foams App 20160297919 - KLESCZEWSKI; BERT ; et al.	2016-10-13
Use Of Urethane Alcohols For Preparation Of Polyether Polyols App 20160264519 - HOFMANN; Jorg ; et al.	2016-09-15
Method For Producing Flexible Polyurethane Foam Materials App 20160257776 - Jacobs; Gundolf ; et al.	2016-09-08
Process for the preparation of polyricinoleic acid ester polyols having primary hydroxyl end groups Grant 9,328,196 - Nefzger , et al. May 3, 2	2016-05-03
Process for producing polyester polyols having secondary OH end groups Grant 9,193,822 - Nefzger , et al. November 24, 2	2015-11-24
Method For Producing Soft Polyurethane Foam Based On Polyester Polyols App 20150299373 - NEFZGER; Hartmut ; et al.	2015-10-22
Process for the preparation of a polyurethane polymer with secondary hydroxyl end groups comprising polyester polyols Grant 9,139,685 - Nefzger , et al. September 22, 2	2015-09-22
Method For Producing Flame-protected Polyurethane Foams Having Low Bulk Densities App 20150141542 - Meyer-Ahrens; Sven ; et al.	2015-05-21
Method For Producing Polyether Ester Polyols App 20140329985 - Lorenz; Klaus ; et al.	2014-11-06
Ballast and process for the production of ballast Grant 8,715,778 - Hoffmann , et al. May 6, 2	2014-05-06
Process For The Preparation Of Polyether Polyols App 20140107245 - Hofmann; Jorg ; et al.	2014-04-17
Method For Producing Flexible Polyurethane Foam Materials App 20140066535 - Jacobs; Gundolf ; et al.	2014-03-06
Method For Producing Flexible Polyurethane Foams App 20130345330 - Nefzger; Hartmut ; et al.	2013-12-26
Process For The Preparation Of Polyricinoleic Acid Ester Polyols Having Primary Hydroxyl End Groups App 20130261205 - Nefzger; Hartmut ; et al.	2013-10-03
Method For Producing Flexible Polyurethane Foams App 20130237624 - Klesczewski; Bert ; et al.	2013-09-12
Visco-elastic polyurethane foam with castor oil Grant 8,183,302 - Klesczewski , et al. May 22, 2	2012-05-22
Process For The Preparation Of A Polyurethane Polymer With Secondary Hydroxyl End Groups Comprising Polyester Polyols App 20120123008 - Nefzger; Hartmut ; et al.	2012-05-17
Process For Producing Polyester Polyols Having Secondary Oh End Groups App 20120116114 - Nefzger; Hartmut ; et al.	2012-05-10
Method For Producing Flame-retardant Polyurethane Foam Materials Having Good Long-term Use Properties App 20120108690 - Klesczewski; Bert ; et al.	2012-05-03
Process For Production Of Flexible Polyurethane Foams With Low Emission App 20100305228 - Gossner; Matthaus ; et al.	2010-12-02
Visco-elastic Polyurethane Foam With Castor Oil App 20090264547 - Klesczewski; Bert ; et al.	2009-10-22
Process for producing polyurethane flexible foamed materials having low bulk density App 20080207791 - Klesczewski; Bert ; et al.	2008-08-28
Process for the preparation of PIPA polyols for the production of highly elastic flexible polyurethane foams App 20080167394 - Haas; Peter ; et al.	2008-07-10
Process for the preparation of PIPA polyols App 20070238796 - Lovenich; Catherine J. ; et al.	2007-10-11
Ballast and process for the production of ballast App 20070172590 - Hoffmann; Andreas ; et al.	2007-07-26
Pur-polyester flexible foams based on polyetheresterpolyols App 20070010593 - Nefzger; Hartmut ; et al.	2007-01-11
Process for the preparation of polyether polyols Grant 6,776,925 - Hofmann , et al. August 17, 2	2004-08-17
Process for producing polyether polyols Grant 6,670,406 - Hofmann , et al. December 30, 2	2003-12-30
Process for producing polyether polyols App 20020198278 - Hofmann, Jorg ; et al.	2002-12-26

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