Granted Patent
Utility
US 4,374,266 · App. 06/220,672
Ammonium salts of fluorophthalamic acids and method of preparation
Inventors:
Michael J. Fifolt, Arthur M. Foster
Patented Case
View Patent ↗
Granted: Feb 15, 1983
Filed: Dec 29, 1980
Inventors
Michael J. Fifolt
Arthur M. Foster
Assignee (at issue)
Occidental Chemical 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.