Granted Patent
Utility
US 6,187,262 · App. 09/136,884
Inhibition of corrosion in aqueous systems
Inventors:
Longchun Cheng, Kim A. Whitaker
Patented Case
View Patent ↗
Granted: Feb 13, 2001
Filed: Aug 19, 1998
Inventors
Longchun Cheng
Kim A. Whitaker
Assignee (at issue)
Betzdearborn, 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.