Granted Patent
Utility
US 4,381,266 · App. 06/219,201
(N-Substituted benzoyl)halobenzoic acid anhydrides
Inventors:
Robert Garner, Michael J. Whitehead
Patented Case
View Patent ↗
Granted: Apr 26, 1983
Filed: Dec 22, 1980
Inventors
Robert Garner
Michael J. Whitehead
Assignee (at issue)
Ciba-Geigy
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.