Granted Patent
Utility
US 4,684,474 · App. 06/633,209
Organophosphate-containing antifreeze with buffer
Inventors:
Pak S. Leung, William N. Matulewicz
Patented Case
View Patent ↗
Granted: Aug 4, 1987
Filed: Jul 23, 1984
Inventors
Pak S. Leung
William N. Matulewicz
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.