Granted Patent
Utility
US 5,985,238 · App. 08/885,628
Process for preparing ferrierite
Inventors:
Gary M. Pasquale, Brendan Dermot Murray
Patented Case
View Patent ↗
Granted: Nov 16, 1999
Filed: Jun 30, 1997
Inventors
Gary M. Pasquale
Brendan Dermot Murray
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.