Granted Patent
Utility
US 4,398,037 · App. 06/319,770
Process for producing aromatic carboxylic acids and methyl esters thereof
Inventors:
Shinichi Takeda, Masao Nonobe, Kenji Ishida, Yorihiko Omoto, Tatsuro Anno
Patented Case
View Patent ↗
Granted: Aug 9, 1983
Filed: Nov 9, 1981
Inventors
Shinichi Takeda
Masao Nonobe
Kenji Ishida
Yorihiko Omoto
Tatsuro Anno
Assignee (at issue)
Hercofina
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.