Granted Patent
Utility
US 4,297,320 · App. 06/161,711
Coating polymerization reactors with the reaction products of thiodiphenols and a bleach
Inventor:
Louis Cohen
Patented Case
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Granted: Oct 27, 1981
Filed: Jun 23, 1980
Inventor
Louis Cohen
Assignee (at issue)
B. F. Goodrich 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.