Granted Patent
Utility
US 4,673,489 · App. 06/786,274
Method for prevention of fouling in a basic solution by addition of specific nitrogen compounds
Inventor:
Paul V. Roling
Patented Case
View Patent ↗
Granted: Jun 16, 1987
Filed: Oct 10, 1985
Inventor
Paul V. Roling
Assignee (at issue)
Betz Laboratories, 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.