Inventor · disambiguated record
Hartmut Nefzger
Also filed as: NEFZGER HARTMUT
61 granted patents·50 pending applications·188 citations·filing 1993–2022
98Inventor score
Files withBAYER MATERIALSCIENCE AG25COVESTRO DEUTSCHLAND AG24NEFZGER HARTMUT15BAYER AG10COVESTRO INTELLECTUAL PROPERTY GMBH & CO KG8
Top patents by PatentIndex Score
111 records- 0194US8273846B2Polyurethane and polyurethane urea elastomers based on polycarbonate polyolsNEFZGER HARTMUT·Filed 2008·Granted Sep 25, 2012·16 cites·2 claims
- 0293US9051410B2Polyurea-based fabric glueHECKROTH HEIKE·Filed 2010·Granted Jun 9, 2015·10 cites·13 claims
- 0392US9404026B2Polyurea-based fabric glueMEDICAL ADHESIVE REVOLUTION GMBH·Filed 2015·Granted Aug 2, 2016·5 cites·13 claims
- 0491US7893189B2Poly(ether-ester) polyols and processes for their productionBAYER MATERIALSCIENCE AG·Filed 2010·Granted Feb 22, 2011·5 cites·2 claims
- 0589US9815965B2Method for producing polyether carbonate polyolsCOVESTRO DEUTSCHLAND AG·Filed 2014·Granted Nov 14, 2017·4 cites·10 claims
- 0689US9139685B2Process for the preparation of a polyurethane polymer with secondary hydroxyl end groups comprising polyester polyolsNEFZGER HARTMUT·Filed 2010·Granted Sep 22, 2015·6 cites·16 claims
- 0788US10253134B2Rigid PUR/PIR foams of isopropylidenediphenol-based polyethersCOVESTRO DEUTSCHLAND AG·Filed 2016·Granted Apr 9, 2019·2 cites·15 claims
- 0886US10662314B2Method for producing polyether carbonate polyolsCOVESTRO DEUTSCHLAND AG·Filed 2017·Granted May 26, 2020·1 cites·4 claims
- 0984US9000089B2Polyurea systems, processes for preparing the same and use thereof for postoperative adhesion barriersHECKROTH HEIKE·Filed 2009·Granted Apr 7, 2015·6 cites·20 claims
- 1084US8334035B2Polyester polyols from terephthalic acid and oligoalkylene oxidesNEFZGER HARTMUT·Filed 2010·Granted Dec 18, 2012·5 cites·16 claims
- 1183US9458277B2Homogeneous extruded articles made from thermoplastically processable polyurethanes based on polyester diols formed from succinic acid and 1,3-propanediolBAYER IP GMBH·Filed 2012·Granted Oct 4, 2016·3 cites·9 claims
- 1282US9714216B2Use of urethane alcohols for preparation of polyether polyolsCOVESTRO DEUTSCHLAND AG·Filed 2014·Granted Jul 25, 2017·3 cites·12 claims
- 1381US9757492B2Hydroxy amino polymer and use thereof in polyurea/polyurethane tissue adhesivesADHESYS MEDICAL GMBH·Filed 2017·Granted Sep 12, 2017·2 cites·18 claims
- 1480US12351853B2Urethanases for the enzymatic degradation of polyurethanesCOVESTRO INTELLECTUAL PROPERTY GMBH & CO KG·Filed 2022·Granted Jul 8, 2025·1 cites·12 claims
- 1580US10487175B2Use of alcohols containing at least two urethane groups for preparation of polyether polyolsCOVESTRO DEUTSCHLAND AG·Filed 2016·Granted Nov 26, 2019·1 cites·11 claims
- 1678US10125217B2Method for producing polyether carbonate polyolsCOVESTRO DEUTSCHLAND AG·Filed 2014·Granted Nov 13, 2018·2 cites·12 claims
- 1778US7893150B2Polymer dispersions in polyester polyolsBAYER MATERIALSCIENCE AG·Filed 2010·Granted Feb 22, 2011·3 cites·2 claims
- 1877US6140381ADelayed action catalysts for carpet backing and air frothed foamBAYER AG·Filed 1999·Granted Oct 31, 2000·32 cites·19 claims
- 1976US6858699B2Polyurethane elastomers and processes for their preparation and useBAYER AG·Filed 2003·Granted Feb 22, 2005·14 cites·8 claims
- 2074US7763683B2Polyester polyols, a process for the production thereof and the use thereofBAYER MATERIALSCIENCE AG·Filed 2007·Granted Jul 27, 2010·2 cites·4 claims
- 2172US9062149B2High-value polyurethane elastomers and production thereofHUPKA FLORIAN·Filed 2012·Granted Jun 23, 2015·2 cites·13 claims
- 2272US9029495B2Process for producing polyether polyols having primary hydroxyl end groupsNEFZGER HARTMUT·Filed 2010·Granted May 12, 2015·1 cites·15 claims
- 2372US8481606B2Process for the production of polyester polyols with low volumes of dioxane wasteNEFZGER HARTMUT·Filed 2009·Granted Jul 9, 2013·2 cites·14 claims
- 2472US7687599B2Poly(ether-ester) polyols and processes for their productionBAYER MATERIALSCIENCE AG·Filed 2006·Granted Mar 30, 2010·1 cites·2 claims
- 2572US6407201B1Plasticizers for bowling ball coverstocksBAYER AG·Filed 2000·Granted Jun 18, 2002·5 cites·5 claims
- 2670US9193822B2Process for producing polyester polyols having secondary OH end groupsNEFZGER HARTMUT·Filed 2010·Granted Nov 24, 2015·1 cites·7 claims
- 2768US8592623B2Method for producing polyester polyols having low amounts of dioxane wasteROERS ROLF·Filed 2009·Granted Nov 26, 2013·2 cites·10 claims
- 2866US9717819B2Polyurea-based fabric glueADHESYS MEDICAL GMBH·Filed 2016·Granted Aug 1, 2017·0 cites·8 claims
- 2965US9733394B2Method for preparing optical lensesCOVESTRO DEUTSCHLAND AG·Filed 2016·Granted Aug 15, 2017·0 cites·13 claims
- 3064US2020223973A1Polyurea systems, processes for preparing the same and use thereof for postoperative adhesion barriersADHESYS MEDICAL GMBH·Filed 2020·Application pending·0 cites
- 3163US11926701B2Polycarbonate polyols, polyisocyanate prepolymers and polyurethane and polyurethane urea elastomers based thereonCOVESTRO DEUTSCHLAND AG·Filed 2018·Granted Mar 12, 2024·0 cites·15 claims
- 3263US10633481B2Polyurea systems, processes for preparing the same and use thereof for postoperative adhesion barriersADHESYS MEDICAL GMBH·Filed 2015·Granted Apr 28, 2020·0 cites·14 claims
- 3363US6541411B2Titanium/zirconium catalysts and their use to prepare esters or polyestersBAYER AG·Filed 2001·Granted Apr 1, 2003·5 cites·12 claims
- 3463US6020386AProcess for the production of hydroxyfunctional compounds from (polyurethane) polyurea wasteBAYER AG·Filed 1994·Granted Feb 1, 2000·18 cites·15 claims
- 3562US9354355B2Lightfast polyurethane compositionBAYER MATERIALSCIENCE AG·Filed 2013·Granted May 31, 2016·0 cites·15 claims
- 3662US8697830B2Aliphatic, sinterable, thermoplastic polyurethane molding compositions with improved blooming behaviorPEERLINGS HENRICUS·Filed 2007·Granted Apr 15, 2014·1 cites·3 claims
- 3761US10519276B2Use of alcohols which contain at least two urethane groups for producing polyether carbonate polyolsCOVESTRO DEUTSCHLAND AG·Filed 2016·Granted Dec 31, 2019·0 cites·12 claims
- 3861US2008306176A1NCO Prepolymers Having A Low Content Of Free Monomeric Diisocyanate, And The Production ThereofBAYER MATERIALSCIENCE AG·Filed 2008·Application pending·0 cites
- 3960US11434321B2Flame-retardant polyurethane rigid foamsCOVESTRO DEUTSCHLAND AG·Filed 2018·Granted Sep 6, 2022·0 cites·11 claims
- 4060US9751279B2Composite elements composed from thermoplastic polymers and polyurethanes, and process for production thereofALBACH ROLF WILLIAM·Filed 2012·Granted Sep 5, 2017·1 cites·12 claims
- 4159US9580540B2Hydroxy amino polymer and use thereof in polyurea/polyurethane tissue adhesivesADHESYS MEDICAL GMBH·Filed 2012·Granted Feb 28, 2017·0 cites·18 claims
- 4259US8110704B2Process for the production of stable polymersBARNES JAMES MICHAEL·Filed 2006·Granted Feb 7, 2012·1 cites·5 claims
- 4357US6977290B2Process for preparing oligomeric aliphatic diols, polycarbonatediols based thereon and prepolymers thereofBAYER AG·Filed 2004·Granted Dec 20, 2005·3 cites·12 claims
- 4457US2008146695A1Molding CompositionsNEFZGER HARTMUT·Filed 2007·Application pending·0 cites
- 4557US2010022739A1Impression CompoundsHERAEUS KULZER GMBH·Filed 2007·Application pending·0 cites
- 4655US9957352B2Use of urethane alcohols for preparing polyether carbonate polyolsCOVESTRO DEUTSCHLAND AG·Filed 2014·Granted May 1, 2018·0 cites·12 claims
- 4755US2009131606A1Polyurethane/polyurea elastomers based on 2,4'-diphenylmethane diisocyanate prepolymers and the production thereofBAYER MATERIALSCIENCE AG·Filed 2008·Application pending·0 cites
- 4854US10907007B2Polyurethane foams based on polyethercarbonate polyolsCOVESTRO INTELLECTUAL PROPERTY GMBH & CO KG·Filed 2019·Granted Feb 2, 2021·0 cites·14 claims
- 4954US2022315698A1Method for producing polyether carbonate polyolsCOVESTRO DEUTSCHLAND AG·Filed 2020·Application pending·0 cites
- 5054US2022227928A1Method for preparing polyether carbonate polyolsCOVESTRO INTELLECTUAL PROPERTY GMBH & CO KG·Filed 2020·Application pending·0 cites
Showing the top 50 of 111 patent records by PatentIndex Score.
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