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.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →