Granted Patent
Utility
US 4,299,754 · App. 06/081,200
Surface treating agent and method for its production
Inventors:
Teiichi Shiomi, Tadao Saito, Riichiro Nagano
Patented Case
View Patent ↗
Granted: Nov 10, 1981
Filed: Oct 2, 1979
Inventors
Teiichi Shiomi
Tadao Saito
Riichiro Nagano
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.