Granted Patent
Utility
US 4,213,882 · App. 05/712,633
Preparation method for catalyst support and materials produced thereby
Inventor:
Herbert Kranich, Jr.
Patented Case
View Patent ↗
Granted: Jul 22, 1980
Filed: Aug 9, 1976
Inventor
Herbert Kranich, Jr.
Assignee (at issue)
Johns Manville
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.