Granted Patent
Utility
US 4,796,702 · App. 07/096,261
Multipurpose aqueous foamer
Inventor:
Gary A. Scherubel
Patented Case
View Patent ↗
Granted: Jan 10, 1989
Filed: Sep 4, 1987
Inventor
Gary A. Scherubel
Assignee (at issue)
Petrolite 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.