Granted Patent
Utility
US 4,379,891 · App. 06/274,111
Multifunctional coupling agent
Inventor:
George R. Haynes
Patented Case
View Patent ↗
Granted: Apr 12, 1983
Filed: Jun 15, 1981
Inventor
George R. Haynes
Assignee (at issue)
SHELL 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.