Granted Patent
Utility
US 4,822,655 · App. 06/894,931
Butyl rubber preformed tape sealant
Inventor:
Van R. Foster
Patented Case
View Patent ↗
Granted: Apr 18, 1989
Filed: Aug 8, 1986
Inventor
Van R. Foster
Assignee (at issue)
Beecham Home Improvements Products Inc.
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.