Patents Assigned to Chiyoda Chemical Co., Ltd
  • Functional fluid
    Patent number: 8357642
    Abstract: Provided is a functional fluid including a tetrazole compound (A) and a base oil (B), which may further include a triazole compound (C).
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: January 22, 2013
    Assignee: Chiyoda Chemical Co., Ltd.
    Inventors: Akio Maeda, Satoshi Yamamoto
  • FUNCTIONAL FLUID
    Publication number: 20100137174
    Abstract: Provided is a functional fluid including a tetrazole compound (A) and a base oil (B), which may further include a triazole compound (C).
    Type: Application
    Filed: May 24, 2007
    Publication date: June 3, 2010
    Applicant: CHIYODA CHEMICAL CO., LTD.
    Inventors: Akio Maeda, Satoshi Yamamoto
  • Surface treatment method of metal member, and metal goods
    Patent number: 7381281
    Abstract: A method of surface-treating a metal member involves heating, or heating under pressure, the metal member in an aqueous alkaline solution having a pH of 9 or more and containing a manganese compound and a chelating agent dissolved in water, whereby a mold release agent or dirt is removed from the metal member without any pre-cleaning process. The surface treatment forms on the metal member a surface treatment layer providing excellent corrosion resistance. Paint, which adheres well to the surface treatment layer, can provide additional corrosion protection.
    Type: Grant
    Filed: November 15, 2002
    Date of Patent: June 3, 2008
    Assignee: Chiyoda Chemical Co., Ltd
    Inventors: Akio Maeda, Seiji Kuge
  • Surface treatment method of metal member, and metal goods
    Publication number: 20030226621
    Abstract: A method of surface-treating a metal member involves heating, or heating under pressure, the metal member in an aqueous alkaline solution having a pH of 9 or more and containing a manganese compound and a chelating agent dissolved in water, whereby a mold release agent or dirt is removed from the metal member without any pre-cleaning process. The surface treatment forms on the metal member a surface treatment layer providing excellent corrosion resistance. Paint, which adheres well to the surface treatment layer, can provide additional corrosion protection.
    Type: Application
    Filed: November 15, 2002
    Publication date: December 11, 2003
    Applicant: Chiyoda Chemical Co., Ltd.
    Inventors: Akio Maeda, Seiji Kuge