Granted Patent
Utility
US 4,283,556 · App. 06/119,245
Process for the manufacture of substantially pure 3-amino-4-alkoxy-acylanilides from 2,4-dinitrochlorobenzene
Inventor:
Philip C. Lang
Patented Case
View Patent ↗
Granted: Aug 11, 1981
Filed: Feb 7, 1980
Inventor
Philip C. Lang
Assignee (at issue)
Toms River Chemical 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.