Granted Patent
Utility
US 5,138,097 · App. 07/658,813
Amine terminated polyamides
Inventors:
George P. Speranza, Wei-Yang Su
Patented Case
View Patent ↗
Granted: Aug 11, 1992
Filed: Feb 22, 1991
Inventors
George P. Speranza
Wei-Yang Su
Assignee (at issue)
Texaco Chemical Inc.
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.