Granted Patent
Utility
US 5,866,496 · App. 08/789,692
Cracking catalyst and process for preparing same
Inventors:
Edwin W. Albers, Harry W. Burkhead, Jr., Joseph C. S. Shi
Patented Case
View Patent ↗
Granted: Feb 2, 1999
Filed: Jan 27, 1997
Inventors
Edwin W. Albers
Harry W. Burkhead, Jr.
Joseph C. S. Shi
Assignee (at issue)
Thiele Kaolin 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.