Granted Patent
Utility
US 5,460,713 · App. 08/129,352
Process for producing low viscosity lubricating base oil having high viscosity index
Inventors:
Tetsuo Takito, Motohiko Iwata, Yuji Yoshizumi, Yasuo Kinoshita
Patented Case
View Patent ↗
Granted: Oct 24, 1995
Filed: Sep 30, 1993
Inventors
Tetsuo Takito
Motohiko Iwata
Yuji Yoshizumi
Yasuo Kinoshita
Assignee (at issue)
Mitsubishi Oil Co., Ltd.
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.