Granted Patent
Utility
US 4,661,554 · App. 06/814,475
Polynetwork EPDM rubber
Inventors:
Aubert Y. Coran, Cynthia K. Endter
Patented Case
View Patent ↗
Granted: Apr 28, 1987
Filed: Dec 30, 1985
Inventors
Aubert Y. Coran
Cynthia K. Endter
Assignee (at issue)
Monsanto 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.