Granted Patent
Utility
US 4,410,684 · App. 06/464,316
Aromatic copolyamides containing ether linkages
Inventors:
Robert G. Nelb, II, Kemal Onder
Patented Case
View Patent ↗
Granted: Oct 18, 1983
Filed: Feb 7, 1983
Inventors
Robert G. Nelb, II
Kemal 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.