Granted Patent
Utility
US 4,237,314 · App. 06/073,050
Phenyl acetic acid preparation
Inventors:
Ming N. Sheng, Jar-Lin Kao
Patented Case
View Patent ↗
Granted: Dec 2, 1980
Filed: Sep 6, 1979
Inventors
Ming N. Sheng
Jar-Lin Kao
Assignee (at issue)
Atlantic Richfield 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.