Granted Patent
Utility
US 5,137,985 · App. 07/411,351
Miscible blends of polybenzimidazoles and polyamide-imides having fluorine-containing linking groups and process for preparation of the blends
Inventors:
Paul N. Chen, Sr., Morton Glick, Rohitkumar H. Vora, Michael Jaffe
Patented Case
View Patent ↗
Granted: Aug 11, 1992
Filed: Sep 22, 1989
Inventors
Paul N. Chen, Sr.
Morton Glick
Rohitkumar H. Vora
Michael Jaffe
Assignee (at issue)
Hoechst Celanese Corporation
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.