Inventor · disambiguated record
David D. Steppan
Also filed as: STEPPAN DAVID · STEPPAN DAVID D
42 granted patents·13 pending applications·803 citations·filing 1991–2024
98Inventor score
Top patents by PatentIndex Score
55 records- 0193US10227779B2Methods for making pre-fabricated insulated wall structures and apparatus for use in such methodsCOVESTRO LLC·Filed 2016·Granted Mar 12, 2019·12 cites·25 claims
- 0292USD940741SDisplay screen portion with graphical user interfaceCOVESTRO LLC·Filed 2021·Granted Jan 11, 2022·20 cites·1 claims
- 0391USD960173SDisplay screen with graphical user interfaceCOVESTRO LLC·Filed 2020·Granted Aug 9, 2022·30 cites·1 claims
- 0491US5739253ARIM elastomers based on prepolymers of cycloaliphatic diisocyanatesBAYER AG·Filed 1996·Granted Apr 14, 1998·63 cites·7 claims
- 0591US5663272AAllophanate-modified diphenylmethane diisocyanates and processes for their production and useBAYER AG·Filed 1995·Granted Sep 2, 1997·66 cites·13 claims
- 0689USD944262SDisplay screen or portion thereof with a graphical user interfaceCOVESTRO LLC·Filed 2020·Granted Feb 22, 2022·12 cites·1 claims
- 0789USD907059SDisplay screen or portion thereof with a graphical user interfaceCOVESTRO LLC·Filed 2018·Granted Jan 5, 2021·27 cites·1 claims
- 0888USD929428SDisplay screen portion with graphical user interfaceCOVESTRO LLC·Filed 2018·Granted Aug 31, 2021·31 cites·1 claims
- 0988USD907058SDisplay screen or portion thereof with a graphical user interfaceCOVESTRO LLC·Filed 2018·Granted Jan 5, 2021·26 cites·1 claims
- 1088USD894922SDisplay screen or portion thereof with an animated graphical user interfaceCOVESTRO LLC·Filed 2018·Granted Sep 1, 2020·32 cites·1 claims
- 1187US5668239AHigh modulus, high impact polyurethane/polyurea RIMBAYER AG·Filed 1996·Granted Sep 16, 1997·54 cites·9 claims
- 1285USD868807SDisplay screen portion with a graphical user interfaceCOVESTRO LLC·Filed 2017·Granted Dec 3, 2019·21 cites·1 claims
- 1384US5801210AMethod and apparatus for the production of essentially void free foamsBAYER AG·Filed 1997·Granted Sep 1, 1998·40 cites·5 claims
- 1482USD907057SDisplay screen or portion thereof with a graphical user interfaceCOVESTRO LLC·Filed 2018·Granted Jan 5, 2021·17 cites·1 claims
- 1582US5502147AAliphatic rim elastomersBAYER AG·Filed 1993·Granted Mar 26, 1996·32 cites·23 claims
- 1681US5973099APolyurethane resin transfer molding systemsBAYER AG·Filed 1998·Granted Oct 26, 1999·38 cites·13 claims
- 1780USD946019SDisplay screen or portion thereof with an animated graphical user interfaceCOVESTRO LLC·Filed 2020·Granted Mar 15, 2022·8 cites·1 claims
- 1876USD951273SDisplay screen or portion thereof with a graphical user interfaceCOVESTRO LLC·Filed 2020·Granted May 10, 2022·5 cites·1 claims
- 1975US2024387006A1System, method, and computer program product for predicting properties of a polymerCOVESTRO LLC·Filed 2024·Application pending·0 cites
- 2074US5502150ALinear HDI urethane prepolymers for rim applicationBAYER AG·Filed 1994·Granted Mar 26, 1996·22 cites·14 claims
- 2174US5350778APolyisocyanate based upon 4,4'- and 2,4'-diphenylmethane diisocyanates and use thereof in a rim processMILES INC·Filed 1993·Granted Sep 27, 1994·24 cites·4 claims
- 2272US6765080B2High performance RIM elastomers and a process for their productionBAYER AG·Filed 2002·Granted Jul 20, 2004·11 cites·26 claims
- 2372US6005016ARigid polyurethane foam based on polyethers of TDABAYER AG·Filed 1998·Granted Dec 21, 1999·27 cites·12 claims
- 2472US5714565AHeat resistant structural rim productBAYER AG·Filed 1995·Granted Feb 3, 1998·24 cites·8 claims
- 2572US5686042ARim process using liquid methylene diphenyl diisocyanateBAYER AG·Filed 1995·Granted Nov 11, 1997·26 cites·13 claims
- 2669USD868806SDisplay screen portion with a graphical user interfaceCOVESTRO LLC·Filed 2017·Granted Dec 3, 2019·12 cites·1 claims
- 2769US7199168B2Process for making cellular composites using polymeric isocyanates as binders for hollow filler particlesBAYER MATERIALSCIENCE LLC·Filed 2002·Granted Apr 3, 2007·10 cites·8 claims
- 2868US5277862AResin transfer molding processMILES INC·Filed 1993·Granted Jan 11, 1994·16 cites·13 claims
- 2966US6586487B1Low-density, water blown polyurethane foams for energy-absorbing applicationsBAYER AG·Filed 2000·Granted Jul 1, 2003·7 cites·11 claims
- 3063US5847014AWater blown, energy absorbing foamsBAYER AG·Filed 1997·Granted Dec 8, 1998·20 cites·10 claims
- 3163US5567793AUrethane-free, diphenylmethane diisocyanate prepolymers and process for their productionBAYER AG·Filed 1995·Granted Oct 22, 1996·17 cites·11 claims
- 3261US6617368B2Isotropic rigid foamsBAYER AG·Filed 2001·Granted Sep 9, 2003·5 cites·34 claims
- 3360USD951291SDisplay screen or portion thereof with a graphical user interfaceCOVESTRO LLC·Filed 2020·Granted May 10, 2022·2 cites·1 claims
- 3459USD928819SDisplay screen portion with a graphical user interfaceCOVESTRO LLC·Filed 2019·Granted Aug 24, 2021·5 cites·1 claims
- 3559USD881209SDisplay screen portion with a graphical user interfaceCOVESTRO LLC·Filed 2019·Granted Apr 14, 2020·5 cites·1 claims
- 3654US2021233618A1System, method, and computer program product for predicting properties of a polymerCOVESTRO LLC·Filed 2019·Application pending·0 cites
- 3752US11854053B2Methods for graphical depiction of a value of a property of a materialCOVESTRO LLC·Filed 2020·Granted Dec 26, 2023·0 cites·14 claims
- 3851US5198522AReaction injection molding based on diethyl methylene diphenyl diisocyanateMILES INC·Filed 1991·Granted Mar 30, 1993·7 cites·6 claims
- 3949US2022101453A1Method, system, and computer program product for creating a recipe for a chemical compositionCOVESTRO LLC·Filed 2020·Application pending·0 cites
- 4048US2007142601A1RIM elastomers based on isocyanurates of isophorone diisocyanate and prepolymers thereofBAYER MATERIALSCIENCE LLC·Filed 2005·Application pending·0 cites
- 4148US2025319662A1Methods for creating a heat sink designCOVESTRO LLC·Filed 2023·Application pending·0 cites
- 4247US7300961B2Polyol compositions useful for preparing dimensionally stable, low density water-blown rigid foams and the processes related theretoBAYER MATERIALSCIENCE LLC·Filed 2002·Granted Nov 27, 2007·2 cites·10 claims
- 4346US6258867B1Method for making semi-rigid energy-absorbing foam with polyurethane fillersBAYER AG·Filed 1999·Granted Jul 10, 2001·8 cites·11 claims
- 4446US2021374295A1Techniques to custom design productsCOVESTRO LLC·Filed 2019·Application pending·0 cites
- 4545US5324773AStabilization of RIM systems containing acidic additivesMILES INC·Filed 1993·Granted Jun 28, 1994·5 cites·3 claims
- 4643US2021097211A1Techniques to custom design productsCOVESTRO LLC·Filed 2019·Application pending·0 cites
- 4742US2024123460A1Methods, systems and computer program products for production and application of spray foam using optical and infrared imagingCOVESTRO LLC·Filed 2020·Application pending·0 cites
- 4842US2022277406A1Method of optimizing an industrial process based on environmental factorsCOVESTRO LLC·Filed 2020·Application pending·0 cites
- 4941US2020210056A1Techniques to custom design productsCOVESTRO LLC·Filed 2018·Application pending·0 cites
- 5040US2022324142A1Methods, systems and computer program products for producing rigid foam boards using optical and infrared imagingCOVESTRO LLC·Filed 2020·Application pending·0 cites
Showing the top 50 of 55 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →