Granted Patent
Utility
US 4,590,319 · App. 06/705,526
Method for the partial hydrogenation of conjugated dienes
Inventors:
Naoshi Imaki, Yoshiko Fukumoto
Patented Case
View Patent ↗
Granted: May 20, 1986
Filed: Feb 26, 1985
Inventors
Naoshi Imaki
Yoshiko Fukumoto
Assignee (at issue)
Mitsubishi Chemical Industries, 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.