Granted Patent
Utility
US 4,886,909 · App. 07/222,696
Aromatic amine terminated trifunctional polyoxyalkylene urea
Inventors:
Jiang-Jen Lin, George P. Speranza
Patented Case
View Patent ↗
Granted: Dec 12, 1989
Filed: Jul 22, 1988
Inventors
Jiang-Jen Lin
George P. Speranza
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.