Granted Patent
Utility
US 4,334,112 · App. 05/948,656
Process for producing 2,5-dichloro-p-xylene
Inventor:
Young Jin Lee
Patented Case
View Patent ↗
Granted: Jun 8, 1982
Filed: Oct 5, 1978
Inventor
Young Jin Lee
Assignee (at issue)
Union Carbide 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.