Granted Patent
Utility
US 5,760,147 · App. 08/634,502
Polyamide foams and process for their production
Inventors:
Axel Schonfeld, Georg Frank, Andreas Schleicher, Helmut Scheckenbach, Siegfried K. Weis
Patented Case
View Patent ↗
Granted: Jun 2, 1998
Filed: Apr 18, 1996
Inventors
Axel Schonfeld
Georg Frank
Andreas Schleicher
Helmut Scheckenbach
Siegfried K. Weis
Assignee (at issue)
Hoechst GmbH
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.