Granted Patent
Utility
US 5,076,967 · App. 07/668,050
Semiconductive rubber foam
Inventors:
Tetsuo Tojo, Yoshiharu Kikuchi, Keiji Okada
Patented Case
View Patent ↗
Granted: Dec 31, 1991
Filed: Mar 12, 1991
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.