Granted Patent
Utility
US 4,382,878 · App. 06/275,654
Catalytic supports with controlled pore properties
Inventor:
William L. Kehl
Patented Case
View Patent ↗
Granted: May 10, 1983
Filed: Jun 22, 1981
Inventor
William L. Kehl
Assignee (at issue)
Gulf Research & Development Company
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.