Granted Patent
Utility
US 4,402,907 · App. 06/289,583
Triazine carboxylic acids as corrosion inhibitors for aqueous systems
Inventor:
David R. Clark
Patented Case
View Patent ↗
Granted: Sep 6, 1983
Filed: Aug 3, 1981
Inventor
David R. Clark
Assignee (at issue)
Ciba-Geigy
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.