Granted Patent
Utility
US 4,405,489 · App. 06/225,389
Production of a post-foaming gel and system therefor
Inventor:
Frederick P. Sisbarro
Patented Case
View Patent ↗
Granted: Sep 20, 1983
Filed: Jan 15, 1981
Inventor
Frederick P. Sisbarro
Assignee (at issue)
Carter Wallace, 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.