Granted Patent
Utility
US 4,534,925 · App. 06/443,225
Uninhibited bentonite composition
Inventor:
Todd D. Harriett
Patented Case
View Patent ↗
Granted: Aug 13, 1985
Filed: Nov 22, 1982
Inventor
Todd D. Harriett
Assignee (at issue)
American Colloid Company
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.