Granted Patent
Utility
US 4,824,908 · App. 07/029,558
Butadiene-based rubber composition
Inventors:
Fumio Tsutsumi, Mitsuhiko Sakakibara, Noboru Shimada, Yoshihisa Fujinaga, Noboru Oshima, Tatsuro Hamada, Tatsuo Fujimaki
Patented Case
View Patent ↗
Granted: Apr 25, 1989
Filed: Mar 24, 1987
Inventors
Fumio Tsutsumi
Mitsuhiko Sakakibara
Noboru Shimada
Yoshihisa Fujinaga
Noboru Oshima
Tatsuro Hamada
Tatsuo Fujimaki
Assignee (at issue)
Japan Synthetic Rubber Corporation
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.