Granted Patent
Utility
US 4,250,122 · App. 06/073,472
Process and catalyst mixture for the para-directed chlorination of alkylbenzenes
Inventors:
Henry Lin, Stephen Robota
Patented Case
View Patent ↗
Granted: Feb 10, 1981
Filed: Sep 7, 1979
Inventors
Henry Lin
Stephen Robota
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.