Inventor · disambiguated record
Hans-Georg Pirkl
Also filed as: PIRKL HANS-GEORG
16 granted patents·3 pending applications·313 citations·filing 1995–2016
93Inventor score
Files withBAYER MATERIALSCIENCE AG7BAYER AG6COVESTRO DEUTSCHLAND AG2PIRKL HANS-GEORG2SCHMIDT MANFRED1
Top patents by PatentIndex Score
19 records- 0196US6054553AProcess for the preparation of polymers having recurring agentsBAYER AG·Filed 1996·Granted Apr 25, 2000·201 cites·38 claims
- 0294US7253321B2Process for the preparation of polyamines of the diphenylmethane series at a low degree of protonationBAYER MATERIALSCIENCE AG·Filed 2005·Granted Aug 7, 2007·23 cites·9 claims
- 0383US6649798B2Method for production of diaminodiphenylmethanesBAYER AG·Filed 2001·Granted Nov 18, 2003·15 cites·7 claims
- 0479US7495124B2Process for the production of very pure 2,4′-methylenediphenyl diisocyanateBAYER MATERIALSCIENCE AG·Filed 2005·Granted Feb 24, 2009·10 cites·18 claims
- 0578US10125217B2Method for producing polyether carbonate polyolsCOVESTRO DEUTSCHLAND AG·Filed 2014·Granted Nov 13, 2018·2 cites·12 claims
- 0676US7041776B2Process for the production of polyisocyanates of the diphenylmethane series by phosgenation of non-neutralized polyamine of the diphenylmethane seriesBAYER AG·Filed 2003·Granted May 9, 2006·8 cites·9 claims
- 0775US8022200B2Process for the preparation of liquid, storage-stable organic isocyanates of low color number containing carbodiimide and/or uretonimine groupsBAYER MATERIALSCIENCE AG·Filed 2005·Granted Sep 20, 2011·3 cites·10 claims
- 0874US9067864B2Process for producing aromatic aminesSOMMER KNUT·Filed 2007·Granted Jun 30, 2015·4 cites·10 claims
- 0974US7745659B2Process for the production of liquid, storage-stable organic isocyanates with a low colour index having carbodiimide- and/or uretone imine groupsBAYER MATERIALSCIENCE AG·Filed 2005·Granted Jun 29, 2010·2 cites·4 claims
- 1073US7038002B2Production of mixtures of diisocyanates and polyisocyanates from the diphenylmethane series with high contents of 4,4′-methylenediphenyl diisocyanate and 2,4′-methylenediphenyl diisocyanateBAYER MATERIALSCIENCE AG·Filed 2004·Granted May 2, 2006·9 cites·11 claims
- 1164US5616818AProcess for the polynitration of aromatic compoundsBAYER AG·Filed 1995·Granted Apr 1, 1997·27 cites·19 claims
- 1253US6528690B2Adiabatic process for producing dinitrotolueneBAYER AG·Filed 1998·Granted Mar 4, 2003·5 cites·12 claims
- 1351US7662634B2Method and device for determining the isomer composition in isocyanate production processesBAYER MATERIALSCIENCE AG·Filed 2004·Granted Feb 16, 2010·1 cites·12 claims
- 1447US2015307647A1Process for producing flexible polyurethane foams with high comfort value and low hysteresis lossesBAYER MATERIALSCIENCE AG·Filed 2013·Application pending·0 cites
- 1540US2018237577A1Use of polyether carbonate polyols for producing polyurethane foams with stable colourCOVESTRO DEUTSCHLAND AG·Filed 2016·Application pending·0 cites
- 1638US9487616B2Lightly modified prepolymers and uses thereofPIRKL HANS-GEORG·Filed 2011·Granted Nov 8, 2016·0 cites·19 claims
- 1738US8835591B2Method for preparing polyurethane prepolymers containing isocyanate groupsPIRKL HANS-GEORG·Filed 2011·Granted Sep 16, 2014·0 cites·8 claims
- 1838US2012202945A1Polyurethanes and use thereofSCHMIDT MANFRED·Filed 2010·Application pending·0 cites
- 1931US5679761AIminodisuccinate-containing polymersBAYER AG·Filed 1995·Granted Oct 21, 1997·3 cites·20 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →