Granted Patent
Utility
US 4,400,338 · App. 06/348,906
Method for making sealant
Inventor:
John R. Rundo
Patented Case
View Patent ↗
Granted: Aug 23, 1983
Filed: Feb 16, 1982
Inventor
John R. Rundo
Assignee (at issue)
TREMCO INCORPORATED
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.