Granted Patent
Utility
US 4,286,091 · App. 06/151,395
Synthesis of pyridazinone pharmaceutical intermediates using diketene reactant
Inventors:
Russell M. Bimber, Russell Buchman, Michael F. DePompei, Larry J. Powers
Patented Case
View Patent ↗
Granted: Aug 25, 1981
Filed: May 19, 1980
Inventors
Russell M. Bimber
Russell Buchman
Michael F. DePompei
Larry J. Powers
Assignee (at issue)
Diamond Shamrock Corporation
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.