Granted Patent
Utility
US 6,025,440 · App. 08/993,161
Mixture of fluoropolymers, oxidized polyarylene sulfides and polyarylene, sulfides
Inventors:
Helmut Scheckenbach, Gregor Buche
Patented Case
View Patent ↗
Granted: Feb 15, 2000
Filed: Dec 18, 1997
Inventors
Helmut Scheckenbach
Gregor Buche
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.