Granted Patent
Utility
US 4,476,280 · App. 06/466,898
Polyamide compositions from mixtures of trimethylhexamethylene diamine, hexamethylene diamine and diacids
Inventors:
Wassily Poppe, Yu-Tsai Chen
Patented Case
View Patent ↗
Granted: Oct 9, 1984
Filed: Feb 16, 1983
Inventors
Wassily Poppe
Yu-Tsai Chen
Assignee (at issue)
The Standard Oil Company
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.