Granted Patent
Utility
US 6,475,431 · App. 09/288,893
Corrosion inhibitors with low environmental toxicity
Inventors:
Ali Naraghi, Nihal U. Obeyesekere
Patented Case
View Patent ↗
Granted: Nov 5, 2002
Filed: Apr 9, 1999
Inventors
Ali Naraghi
Nihal U. Obeyesekere
Assignee (at issue)
Champion Technologies Ltd.
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.