Granted Patent
Utility
US 4,274,929 · App. 06/161,937
Chemical removal of silicon from waste brine stream for chlor-alkali cell
Inventor:
Donald S. Novak
Patented Case
View Patent ↗
Granted: Jun 23, 1981
Filed: Jun 23, 1980
Inventor
Donald S. Novak
Assignee (at issue)
Diamond Shamrock 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.