Granted Patent
Utility
US 4,335,072 · App. 06/293,620
Overhead corrosion simulator
Inventors:
Jack Barnett, Roy D. Sawyer
Patented Case
View Patent ↗
Granted: Jun 15, 1982
Filed: Aug 17, 1981
Inventors
Jack Barnett
Roy D. Sawyer
Assignee (at issue)
Nalco 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.