Granted Patent
Utility
US 4,906,706 · App. 07/090,347
Modified conjugated diene polymer and process for production thereof
Inventors:
Iwakazu Hattori, Mitsuhiko Sakakibara, Fumio Tsutsumi, Masao Yoshizawa
Patented Case
View Patent ↗
Granted: Mar 6, 1990
Filed: Aug 28, 1987
Inventors
Iwakazu Hattori
Mitsuhiko Sakakibara
Fumio Tsutsumi
Masao Yoshizawa
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.