Granted Patent
Utility
US 4,978,474 · App. 07/077,277
Sealant
Inventor:
Thomas K. Johnston
Patented Case
View Patent ↗
Granted: Dec 18, 1990
Filed: Jul 24, 1987
Inventor
Thomas K. Johnston
Assignee (at issue)
United Technologies Automotive
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.