Granted Patent
Utility
US 4,416,742 · App. 06/304,939
Process and electrolytic bath for making a rhodium-plated article having a black or blue color
Inventors:
Takashi Kinase, Seiji Ichimura, Yoshio Kinjo, Yosuke Matsumoto
Patented Case
View Patent ↗
Granted: Nov 22, 1983
Filed: Sep 23, 1981
Inventors
Takashi Kinase
Seiji Ichimura
Yoshio Kinjo
Yosuke Matsumoto
Assignees (at issue)
Nippon Mining Company Limited
Nippon Metal Plating Co., 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.