Granted Patent
Utility
US 4,309,313 · App. 06/152,642
Synthesis of cesium-containing zeolite, CSZ-1
Inventors:
Michael Barrett, David E. W. Vaughan
Patented Case
View Patent ↗
Granted: Jan 5, 1982
Filed: May 23, 1980
Inventors
Michael Barrett
David E. W. Vaughan
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.