Granted Patent
Utility
US 4,789,406 · App. 07/145,658
Method and compositions for penetrating and removing accumulated corrosion products and deposits from metal surfaces
Inventors:
E. Paul Holder, Frederick C. Klaessig, Pamela J. Peerce-Landers, David W. Reichgott
Patented Case
View Patent ↗
Granted: Dec 6, 1988
Filed: Jan 13, 1988
Inventors
E. Paul Holder
Frederick C. Klaessig
Pamela J. Peerce-Landers
David W. Reichgott
Assignee (at issue)
Betz Laboratories, 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.