Patents by Inventor Seiji Ichimura

Seiji Ichimura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process and electrolytic bath for making a rhodium-plated article having a black or blue color
    Patent number: 4416742
    Abstract: A rhodium-plated article with black or blue color is obtained through electroplating by using a plating bath comprising a conventional acid rhodium bath and an additive consisting of organocarboxylic acid, aromatic sulfonic acid or salts of these, amine, gelatin, butynediol, hypophosphite or a mixture thereof.
    Type: Grant
    Filed: September 23, 1981
    Date of Patent: November 22, 1983
    Assignees: Nippon Mining Co., Ltd., Nippon Metal Plating Co., Ltd.
    Inventors: Takashi Kinase, Seiji Ichimura, Yoshio Kinjo, Yosuke Matsumoto