Granted Patent
Utility
US 5,081,321 · App. 07/464,315
Preparation of isopropanol
Inventors:
Hiroshi Fukuhara, Fujihisa Matsunaga, Yasunori Shibuta, Toshihiro Tachi
Patented Case
View Patent ↗
Granted: Jan 14, 1992
Filed: Jan 12, 1990
Inventors
Hiroshi Fukuhara
Fujihisa Matsunaga
Yasunori Shibuta
Toshihiro Tachi
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.