Granted Patent
Utility
US 4,690,740 · App. 06/837,230
Method for maintaining effective corrosion inhibition in gas scrubbing plant
Inventors:
David C. Cringle, Roscoe L. Pearce, Michael S. DuPart
Patented Case
View Patent ↗
Granted: Sep 1, 1987
Filed: Mar 7, 1986
Inventors
David C. Cringle
Roscoe L. Pearce
Michael S. DuPart
Assignee (at issue)
THE DOW CHEMICAL COMPANY
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.