Granted Patent
Utility
US 4,931,103 · App. 07/230,951
Tricholine phosphate surface treating agent
Inventor:
Charles B. Atwater
Patented Case
View Patent ↗
Granted: Jun 5, 1990
Filed: Aug 11, 1988
Inventor
Charles B. Atwater
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND 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.