Granted Patent
Utility
US 4,296,244 · App. 06/092,118
(3-Trifluoromethylphenyl)-alpha-hydroxyacetic acid and process for preparation
Inventors:
David Y. Tang, Arthur M. Foster
Patented Case
View Patent ↗
Granted: Oct 20, 1981
Filed: Nov 7, 1979
Inventors
David Y. Tang
Arthur M. Foster
Assignee (at issue)
Hooker Chemicals & Plastics 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.