Granted Patent
Utility
US 4,749,504 · App. 06/907,010
Oil-in-water emulsion and use thereof as metal processing oil or the like
Inventors:
Kazuo Aihara, Atsushi Deguchi, Tatsuo Kinoshita
Patented Case
View Patent ↗
Granted: Jun 7, 1988
Filed: Sep 15, 1986
Inventors
Kazuo Aihara
Atsushi Deguchi
Tatsuo Kinoshita
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.