Granted Patent
Utility
US 5,527,860 · App. 08/184,217
Process for producing a diolefin polymer or copolymer and a rubber composition containing such a diolefin polymer or copolymer
Inventors:
Yoshitaka Yamakawa, Kyouyuu Yasuda, Iwakazu Hattori, Hideaki Yokoyama, Tatsuro Hamada
Patented Case
View Patent ↗
Granted: Jun 18, 1996
Filed: Jan 21, 1994
Inventors
Yoshitaka Yamakawa
Kyouyuu Yasuda
Iwakazu Hattori
Hideaki Yokoyama
Tatsuro Hamada
Assignees (at issue)
Japan Synthetic Rubber Corporation
BRIDGESTONE 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.