Granted Patent
Utility
US 4,834,848 · App. 07/151,239
Electrical removal of chromium from chlorate solutions
Inventor:
Marek Lipsztajn
Patented Case
View Patent ↗
Granted: May 30, 1989
Filed: Feb 1, 1988
Inventor
Marek Lipsztajn
Assignee (at issue)
Tenneco Canada Inc.
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.