Granted Patent
Utility
US 5,153,232 · App. 07/652,954
Foamed polyurea elastomer-rigid and close-celled
Inventor:
Dudley J. Primeaux, II
Patented Case
View Patent ↗
Granted: Oct 6, 1992
Filed: Feb 8, 1991
Inventor
Dudley J. Primeaux, II
Assignee (at issue)
Texaco 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.