Granted Patent
Utility
US 4,906,790 · App. 07/242,163
Method of oxidizing secondary alkyl substituted naphtalenes and a process of producing isopropylnaphthols
Inventors:
Masaharu Ishiguro, Hisaya Miki, Nobuya Hirokane
Patented Case
View Patent ↗
Granted: Mar 6, 1990
Filed: Sep 9, 1988
Inventors
Masaharu Ishiguro
Hisaya Miki
Nobuya Hirokane
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.