Granted Patent
Utility
US 4,970,258 · App. 07/230,455
Aqueous dispersion and process for preparation thereof
Inventors:
Shiro Homma, Masatoshi Kashiwagi, Mitsuhiro Tanaka
Patented Case
View Patent ↗
Granted: Nov 13, 1990
Filed: Aug 10, 1988
Inventors
Shiro Homma
Masatoshi Kashiwagi
Mitsuhiro Tanaka
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.