Granted Patent
Utility
US 5,601,798 · App. 08/298,158
Process for preparing zeolite Y with increased mesopore volume
Inventors:
David Allen Cooper, Thomas W. Hastings, Elliot P. Hertzenberg
Patented Case
View Patent ↗
Granted: Feb 11, 1997
Filed: Aug 30, 1994
Inventors
David Allen Cooper
Thomas W. Hastings
Elliot P. Hertzenberg
Assignee (at issue)
PQ 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.