Inventor
David D. Steppan
Inventor
Gibsonia, PA, US
Overview
Patents· 35 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C08Gprimary
C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds43%
LOC1416%
B29CShaping or joining of plastics9%
C08JWorking-up9%
C08LCompositions of macromolecular compounds5%
C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients4%
B05BSpraying apparatus2%
B05DProcesses for applying fluent materials to surfaces, in general2%
B29KIndexing scheme associated with subclasses b29b, b29c or b29d, relating to moulding materials or to materials for moulds, reinforcements, fillers or preformed parts, e.g. inserts2%
B29LIndexing scheme associated with subclass b29c, relating to particular articles2%
PatentTitleYear
D0929428Display screen portion with graphical user interface2021D0928819Display screen portion with a graphical user interface2021D0907057Display screen or portion thereof with a graphical user interface2021D0907058Display screen or portion thereof with a graphical user interface2021D0907059Display screen or portion thereof with a graphical user interface2021D0894922Display screen or portion thereof with an animated graphical user interface2020D0881209Display screen portion with a graphical user interface2020D0868807Display screen portion with a graphical user interface2019D0868806Display screen portion with a graphical user interface201910,227,779Methods for making pre-fabricated insulated wall structures and apparatus for use in such methods20197,300,961'Polyol compositions useful for preparing dimensionally stable, low density water-blown rigid foams and the processes related thereto'20077,199,168'Process for making cellular composites using polymeric isocyanates as binders for hollow filler particles'20076,765,080'High performance RIM elastomers and a process for their production'20046,617,368'Isotropic rigid foams'20036,586,487'Low-density, water blown polyurethane foams for energy-absorbing applications'20036,258,867'Method for making semi-rigid energy-absorbing foam with polyurethane fillers'20016,034,147'Method and apparatus for the production of essentially void free foams'20006,005,016'Rigid polyurethane foam based on polyethers of TDA'19995,973,099'Polyurethane resin transfer molding systems'19995,847,014'Water blown, energy absorbing foams'19985,801,210'Method and apparatus for the production of essentially void free foams'19985,739,253'RIM elastomers based on prepolymers of cycloaliphatic diisocyanates'19985,714,565'Heat resistant structural rim product'19985,710,230'Cycloaliphatic diisocyanate based rim elastomers'19985,686,042'Rim process using liquid methylene diphenyl diisocyanate'19975,668,239'High modulus, high impact polyurethane/polyurea RIM'19975,663,272'Allophanate-modified diphenylmethane diisocyanates and processes for their production and use'19975,567,793'Urethane-free, diphenylmethane diisocyanate prepolymers and process for their production'19965,502,147'Aliphatic rim elastomers'19965,502,150'Linear HDI urethane prepolymers for rim application'19965,473,044'HDI residue in reaction injection molding'19955,350,778'Polyisocyanate based upon 4,4\'- and 2,4\'-diphenylmethane diisocyanates and use thereof in a rim process'19945,324,773'Stabilization of RIM systems containing acidic additives'19945,277,862'Resin transfer molding process'19945,198,522'Reaction injection molding based on diethyl methylene diphenyl diisocyanate'1993Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1993–1994Patents assigned to MILES INC (4)· patent assignee history
1993–2021Based in Gibsonia, PA, US· patent location history
1995–2004Patents assigned to BAYER AG (19)· patent assignee history
2007Patents assigned to BAYER MATERIALSCIENCE LLC (2)· patent assignee history
2019–2021Patents assigned to COVESTRO LLC (10)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BAYER AG | 19 | 1995–2004 |
| COVESTRO LLC | 10 | 2019–2021 |
| MILES INC | 4 | 1993–1994 |
| BAYER MATERIALSCIENCE LLC | 2 | 2007 |
Locations
| Location | Patents | Span |
|---|---|---|
| Gibsonia, Pennsylvania, US | 35 | 1993–2021 |