Granted Patent
Utility
US 4,065,441 · App. 05/664,763
Copolyamide from arylene diamine and mixture of alkylene dicarboxylic acids
Inventors:
Philip S. Andrews, William J. Farrissey, Jr., Besir K. Onder, James N. Tilley
Patented Case
View Patent ↗
Granted: Dec 27, 1977
Filed: Mar 8, 1976
Inventors
Philip S. Andrews
William J. Farrissey, Jr.
Besir K. Onder
James N. Tilley
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.