Patents by Inventor Katsuya Sera

Katsuya Sera 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).

  • Coating method
    Patent number: 4981759
    Abstract: A coating method, which comprises(i) applying to a substrate a multilayer film-forming cationic electrodeposition paint composed of(A) a cationic electrodepositable epoxy resin having a surface tension of 40 to 60 dynes/cm and being able to form a cathodically electrodepositable aqueous bath by neutralization with an acid, and(B) a nonionic film-forming resin having a surface tension of 25 to 45 dynes/cm,the weight ratio of resin (A) to resin (B) being from 60:40 to 98:2 and the surface tension of resin (A) being greater than that of resin (B), and curing the coated film by heating,(ii) applying a water-base or organic solvent-base colored paint as a first top coat, and(iii) applying as a second top coat a powder paint capable of forming a transparent film which may be colored.
    Type: Grant
    Filed: May 2, 1988
    Date of Patent: January 1, 1991
    Assignee: Kansa Paint Co., Ltd.
    Inventors: Eisaku Nakatani, Masaru Mitsuji, Yasuhiro Fujii, Katsuya Sera, Yuzo Miyamoto, Masafumi Kume, Tadayoshi Tatsuno, Akimasa Nakahata