Granted Patent
Utility
US 4,348,369 · App. 06/280,377
Zeolite LZ-200
Inventors:
Richard J. Hinchey, Willis W. Weber
Patented Case
View Patent ↗
Granted: Sep 7, 1982
Filed: Jul 6, 1981
Inventors
Richard J. Hinchey
Willis W. Weber
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.