Granted Patent
Utility
US 3,947,482 · App. 05/452,734
Method for producing open framework zeolites
Inventors:
Edwin W. Albers, David E. W. Vaughan
Patented Case
View Patent ↗
Granted: Mar 30, 1976
Filed: Mar 20, 1974
Inventors
Edwin W. Albers
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.