Granted Patent
Utility
US 4,254,229 · App. 06/106,976
Polyurethane plastics containing thio groups
Inventors:
Jurgen Schwindt, Gerhard Grogler, Paul Uhrhan
Patented Case
View Patent ↗
Granted: Mar 3, 1981
Filed: Dec 26, 1979
Inventors
Jurgen Schwindt
Gerhard Grogler
Paul Uhrhan
Assignee (at issue)
Bayer Aktiengesellschaft
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.