Granted Patent
Utility
US 4,561,985 · App. 06/392,712
Hec-bentonite compatible blends
Inventor:
Joseph E. Glass, Jr.
Patented Case
View Patent ↗
Granted: Dec 31, 1985
Filed: Jun 28, 1982
Inventor
Joseph E. Glass, Jr.
Assignee (at issue)
Union Carbide 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.