Granted Patent
Utility
US 5,220,090 · App. 07/610,945
Method for preparing unsaturated compounds
Inventors:
Tadatoshi Honda, Kazuhiro Terada
Patented Case
View Patent ↗
Granted: Jun 15, 1993
Filed: Nov 9, 1990
Inventors
Tadatoshi Honda
Kazuhiro Terada
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.