Granted Patent
Utility
US 4,343,717 · App. 06/119,649
Process for the preparation of stable silica sol
Inventor:
Brent M. T. Lok
Patented Case
View Patent ↗
Granted: Aug 10, 1982
Filed: Feb 8, 1980
Inventor
Brent M. T. Lok
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.