Granted Patent
Utility
US 4,528,136 · App. 06/484,831
Process for preparing 2-[bis(aryl)methyl]benzoic acids
Inventors:
Paul Schmidt, Patrick J. Jefferies
Patented Case
View Patent ↗
Granted: Jul 9, 1985
Filed: Apr 14, 1983
Inventors
Paul Schmidt
Patrick J. Jefferies
Assignee (at issue)
Hilton Davis Chemical Co.
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.