Granted Patent
Utility
US 4,017,459 · App. 05/614,838
Polyamide-imides
Inventor:
Besir K. Onder
Patented Case
View Patent ↗
Granted: Apr 12, 1977
Filed: Sep 19, 1975
Inventor
Besir K. Onder
Assignee (at issue)
The Upjohn Co.
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.