Granted Patent
Utility
US 4,847,417 · App. 07/262,755
Bis(diaminopolyalkoxy)-N-alkylamines by amination of hydroxyl-containing tertiary amines
Inventors:
John M. Larkin, George P. Speranza
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: Oct 26, 1988
Inventors
John M. Larkin
George P. Speranza
Assignee (at issue)
Texaco 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.