Granted Patent
Utility
US 4,827,025 · App. 07/097,800
Process for the production of aromatic carboxylic acids
Inventors:
Shigemi Shiraki, Kenichi Mizuno
Patented Case
View Patent ↗
Granted: May 2, 1989
Filed: Sep 16, 1987
Inventors
Shigemi Shiraki
Kenichi Mizuno
Assignee (at issue)
Mitsui Petrochemical Industries, Ltd.
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.