Granted Patent
Utility
US 4,778,936 · App. 06/916,099
Triphenol compound
Inventors:
Kenichi Mizuno, Yozo Jujo, Hajime Oyoshi
Patented Case
View Patent ↗
Granted: Oct 18, 1988
Filed: Oct 7, 1986
Inventors
Kenichi Mizuno
Yozo Jujo
Hajime Oyoshi
Assignee (at issue)
Mitsui Petrochemical 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.