Granted Patent
Utility
US 4,997,874 · App. 07/169,499
Aqueous suspension and preparation method thereof
Inventors:
Makoto Asano, Kiyoharu Hasegawa, Masatoshi Takagi, Akihiro Yamaguchi, Keizaburo Yamaguchi, Yoshimitsu Tanabe, Hiroyuki Akahori
Patented Case
View Patent ↗
Granted: Mar 5, 1991
Filed: Mar 17, 1988
Inventors
Makoto Asano
Kiyoharu Hasegawa
Masatoshi Takagi
Akihiro Yamaguchi
Keizaburo Yamaguchi
Yoshimitsu Tanabe
Hiroyuki Akahori
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.