Granted Patent
Utility
US 4,440,871 · App. 06/400,438
Crystalline silicoaluminophosphates
Inventors:
Brent M. T. Lok, Celeste A. Messina, Robert L. Patton, Richard T. Gajek, Thomas R. Cannan, Edith M. Flanigen
Patented Case
View Patent ↗
Granted: Apr 3, 1984
Filed: Jul 26, 1982
Inventors
Brent M. T. Lok
Celeste A. Messina
Robert L. Patton
Richard T. Gajek
Thomas R. Cannan
Edith M. Flanigen
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.