Granted Patent
Utility
US 5,614,160 · App. 08/258,466
Composite silicate materials
Inventors:
Petra Gill, Eric Borgstedt, Raymond P. Denkewicz, Jr.
Patented Case
View Patent ↗
Granted: Mar 25, 1997
Filed: Jun 10, 1994
Inventors
Petra Gill
Eric Borgstedt
Raymond P. Denkewicz, Jr.
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.