Granted Patent
Utility
US 5,041,329 · App. 07/621,970
Vulcanized rubber article and process for the preparation of the same
Inventors:
Tetsuo Tojo, Yoshiharu Kikuchi, Keiji Okada
Patented Case
View Patent ↗
Granted: Aug 20, 1991
Filed: Dec 4, 1990
Inventors
Tetsuo Tojo
Yoshiharu Kikuchi
Keiji Okada
Assignee (at issue)
Mitsui Petrochemical Industries, Ltd.
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.