Granted Patent
Utility
US 4,421,424 · App. 06/341,391
Instrument and method for control testing of vulcanized rubber
Inventors:
Keith Price, Michael Mathews
Patented Case
View Patent ↗
Granted: Dec 20, 1983
Filed: Jan 21, 1982
Inventors
Keith Price
Michael Mathews
Assignee (at issue)
Monsanto Europe S.A.
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.