Granted Patent
Utility
US 5,073,283 · App. 07/336,530
Antifreeze composition concentrate containing oxyalkylene compound and an organic phosphate surface modifier compound
Inventors:
Pak S. Leung, Errol D. Goddard
Patented Case
View Patent ↗
Granted: Dec 17, 1991
Filed: Apr 10, 1989
Inventors
Pak S. Leung
Errol D. Goddard
Assignee (at issue)
First Brands Corporation
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.