Granted Patent
Utility
US 5,015,786 · App. 07/441,477
Preparation of cumene through alkylation of an aromatic compound and preparation of phenol through cumene
Inventors:
Shintaro Araki, Fujihisa Matsunaga, Hiroshi Fukuhara
Patented Case
View Patent ↗
Granted: May 14, 1991
Filed: Nov 27, 1989
Inventors
Shintaro Araki
Fujihisa Matsunaga
Hiroshi Fukuhara
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.