Granted Patent
Utility
US 4,983,528 · App. 07/362,335
Measurement of unsaturation level in butyl and EPDM rubbers
Inventor:
Dennis A. Loucks
Patented Case
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Granted: Jan 8, 1991
Filed: Jun 6, 1989
Inventor
Dennis A. Loucks
Assignee (at issue)
Polytec GmbH
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.