Inventor
STEPPAN DAVID D
US40 patents
⚠️ This page may combine multiple inventors who share the name “STEPPAN DAVID D”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BAYER AG
19 patentsUS5739253AApr 14, 1998
RIM elastomers based on prepolymers of cycloaliphatic diisocyanates
BAYER AG63 citations96
US5663272ASep 2, 1997
Allophanate-modified diphenylmethane diisocyanates and processes for their production and use
BAYER AG66 citations96
US5973099AOct 26, 1999
Polyurethane resin transfer molding systems
BAYER AG38 citations92
US5714565AFeb 3, 1998
Heat resistant structural rim product
BAYER AG24 citations92
US5686042ANov 11, 1997
Rim process using liquid methylene diphenyl diisocyanate
BAYER AG26 citations92
US5668239ASep 16, 1997
High modulus, high impact polyurethane/polyurea RIM
BAYER AG54 citations92
US5502147AMar 26, 1996
Aliphatic rim elastomers
BAYER AG32 citations91
US5502150AMar 26, 1996
Linear HDI urethane prepolymers for rim application
BAYER AG22 citations91
US6005016ADec 21, 1999
Rigid polyurethane foam based on polyethers of TDA
BAYER AG27 citations90
US5801210ASep 1, 1998
Method and apparatus for the production of essentially void free foams
BAYER AG40 citations90
US5847014ADec 8, 1998
Water blown, energy absorbing foams
BAYER AG20 citations89
US6258867B1Jul 10, 2001
Method for making semi-rigid energy-absorbing foam with polyurethane fillers
BAYER AG8 citations74
US5567793AOct 22, 1996
Urethane-free, diphenylmethane diisocyanate prepolymers and process for their production
BAYER AG17 citations74
US6586487B1Jul 1, 2003
Low-density, water blown polyurethane foams for energy-absorbing applications
BAYER AG7 citations73
US6034147AMar 7, 2000
Method and apparatus for the production of essentially void free foams
BAYER AG6 citations71
US6765080B2Jul 20, 2004
High performance RIM elastomers and a process for their production
BAYER AG11 citations69
US5473044ADec 5, 1995
HDI residue in reaction injection molding
BAYER AG3 citations63
US6617368B2Sep 9, 2003
Isotropic rigid foams
BAYER AG5 citations61
US5710230AJan 20, 1998
Cycloaliphatic diisocyanate based rim elastomers
BAYER AG5 citations61
COVESTRO LLC
15 patentsUSD907059SJan 5, 2021
Display screen or portion thereof with a graphical user interface
COVESTRO LLC27 citations93
USD907057SJan 5, 2021
Display screen or portion thereof with a graphical user interface
COVESTRO LLC17 citations93
USD907058SJan 5, 2021
Display screen or portion thereof with a graphical user interface
COVESTRO LLC26 citations93
USD868807SDec 3, 2019
Display screen portion with a graphical user interface
COVESTRO LLC21 citations93
USD894922SSep 1, 2020
Display screen or portion thereof with an animated graphical user interface
COVESTRO LLC32 citations91
USD960173SAug 9, 2022
Display screen with graphical user interface
COVESTRO LLC30 citations89
USD944262SFeb 22, 2022
Display screen or portion thereof with a graphical user interface
COVESTRO LLC12 citations84
USD951273SMay 10, 2022
Display screen or portion thereof with a graphical user interface
COVESTRO LLC5 citations83
USD946019SMar 15, 2022
Display screen or portion thereof with an animated graphical user interface
COVESTRO LLC8 citations83
USD868806SDec 3, 2019
Display screen portion with a graphical user interface
COVESTRO LLC12 citations83
USD928819SAug 24, 2021
Display screen portion with a graphical user interface
COVESTRO LLC5 citations82
USD881209SApr 14, 2020
Display screen portion with a graphical user interface
COVESTRO LLC5 citations82
US10227779B2Mar 12, 2019
Methods for making pre-fabricated insulated wall structures and apparatus for use in such methods
COVESTRO LLC12 citations82
USD951291SMay 10, 2022
Display screen or portion thereof with a graphical user interface
COVESTRO LLC2 citations72
US11854053B2Dec 26, 2023
Methods for graphical depiction of a value of a property of a material
COVESTRO LLC0 citations47
MILES INC
4 patentsUS5350778ASep 27, 1994
Polyisocyanate based upon 4,4'- and 2,4'-diphenylmethane diisocyanates and use thereof in a rim process
MILES INC24 citations89
US5198522AMar 30, 1993
Reaction injection molding based on diethyl methylene diphenyl diisocyanate
MILES INC7 citations74
US5277862AJan 11, 1994
Resin transfer molding process
MILES INC16 citations72
US5324773AJun 28, 1994
Stabilization of RIM systems containing acidic additives
MILES INC5 citations62
BAYER MATERIALSCIENCE LLC
2 patentsUS7199168B2Apr 3, 2007
Process for making cellular composites using polymeric isocyanates as binders for hollow filler particles
BAYER MATERIALSCIENCE LLC10 citations81
US7300961B2Nov 27, 2007
Polyol compositions useful for preparing dimensionally stable, low density water-blown rigid foams and the processes related thereto
BAYER MATERIALSCIENCE LLC2 citations54