Granted Patent
Utility
US 4,226,743 · App. 06/019,676
Silica-alumina hydrogel catalyst
Inventors:
Mark A. Seese, Edwin W. Albers, John S. Magee, Jr.
Patented Case
View Patent ↗
Granted: Oct 7, 1980
Filed: Mar 12, 1979
Inventors
Mark A. Seese
Edwin W. Albers
John S. Magee, Jr.
Assignee (at issue)
W. R. Grace & Co.
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.