Granted Patent
Utility
US 4,485,254 · App. 06/306,990
Process for preparing phenoxybenzoic acids
Inventor:
Charles M. Tanger
Patented Case
View Patent ↗
Granted: Nov 27, 1984
Filed: Sep 30, 1981
Inventor
Charles M. Tanger
Assignee (at issue)
Rohm and Haas Company
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.