Granted Patent
Utility
US 5,548,045 · App. 08/302,958
Process for producing polybutadiene
Inventors:
Kohei Goto, Iwakazu Hattori, Shoji Ogasahara, Masahiro Shibata, Yoshiyuki Michino, Kazuo Soga, Takeshi Shiono
Patented Case
View Patent ↗
Granted: Aug 20, 1996
Filed: Sep 12, 1994
Inventors
Kohei Goto
Iwakazu Hattori
Shoji Ogasahara
Masahiro Shibata
Yoshiyuki Michino
Kazuo Soga
Takeshi Shiono
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.