Granted Patent
Utility
US 4,221,674 · App. 06/018,980
Organic sulfonic acid stripping composition and method with nitrile and fluoride metal corrosion inhibitor system
Inventor:
John E. Vander Mey
Patented Case
View Patent ↗
Granted: Sep 9, 1980
Filed: Mar 9, 1979
Inventor
John E. Vander Mey
Assignee (at issue)
Allied Chemical 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.