Granted Patent
Utility
US 6,527,995 · App. 09/610,832
Process for preparing soft, elastic polyurethane
Inventors:
Wolfgang Kaufhold, Hans-Georg Hoppe, Wolfgang Brauer, Jurgen Winkler, Hans-Georg Wussow
Patented Case
View Patent ↗
Granted: Mar 4, 2003
Filed: Jul 6, 2000
Inventors
Wolfgang Kaufhold
Hans-Georg Hoppe
Wolfgang Brauer
Jurgen Winkler
Hans-Georg Wussow
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.