Granted Patent
Utility
US 4,339,349 · App. 06/120,169
Corrosion inhibitors for limited oxygen systems
Inventors:
Richard L. Martin, Evelyn W. Purdy
Patented Case
View Patent ↗
Granted: Jul 13, 1982
Filed: Feb 11, 1980
Inventors
Richard L. Martin
Evelyn W. Purdy
Assignee (at issue)
Petrolite 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.