Granted Patent
Utility
US 4,954,125 · App. 07/208,664
Catalyst for polymerization of conjugated diene and process for producing conjugated diene polymer
Inventors:
Hisao Ono, Ryuji Sato, Takumi Miyachi
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: Jun 20, 1988
Inventors
Hisao Ono
Ryuji Sato
Takumi Miyachi
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.