Granted Patent
Utility
US 4,415,693 · App. 06/406,126
Stabilization of polyesteramides with urethanes
Inventors:
Augustin T. Chen, Robert G. Nelb, II, Kemal Onder
Patented Case
View Patent ↗
Granted: Nov 15, 1983
Filed: Aug 9, 1982
Inventors
Augustin T. Chen
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.