Granted Patent
Utility
US 4,297,509 · App. 06/133,787
Process for preparing alkali metal salts 3-amino-2, 5-dichlorobenzoic acid
Inventor:
Bertrand A. Chiasson
Patented Case
View Patent ↗
Granted: Oct 27, 1981
Filed: Mar 25, 1980
Inventor
Bertrand A. Chiasson
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.