Granted Patent
Utility
US 4,297,335 · App. 06/133,848
Aluminum deficient zeolite compositions and process for preparing same
Inventors:
Brent M. T. Lok, Thomas J. P. Izod
Patented Case
View Patent ↗
Granted: Oct 27, 1981
Filed: Mar 25, 1980
Inventors
Brent M. T. Lok
Thomas J. P. Izod
Assignee (at issue)
Union Carbide Corporation
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.