Granted Patent
Utility
US 5,227,563 · App. 07/700,319
Preparation of propylene by dehydration of isopropanol in the presence of a pseudo-boehmite derived gamma alumina catalyst
Inventors:
Hiroshi Fukuhara, Fujihisa Matsunaga, Mitsuki Yasuhara, Shintaro Araki, Toshiyuki Isaka
Patented Case
View Patent ↗
Granted: Jul 13, 1993
Filed: May 9, 1991
Inventors
Hiroshi Fukuhara
Fujihisa Matsunaga
Mitsuki Yasuhara
Shintaro Araki
Toshiyuki Isaka
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.