Patents by Inventor Yokio Tatsumi

Yokio Tatsumi 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).

  • Antioxidant composition and lubricating oil composition containing same
    Patent number: 9382498
    Abstract: Provided is an antioxidant composition, including: a compound (A) represented by the following general formula (1); and an amine-based antioxidant (B) and/or a phenol-based antioxidant (C) other than the compound (A): (wherein R represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and n represents a number from 1 to 3.).
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: July 5, 2016
    Assignee: ADEKA CORPORATION
    Inventors: Yokio Tatsumi, Kazuhiro Umehara, Shinji Iino
  • ANTIOXIDANT COMPOSITION AND LUBRICATING OIL COMPOSITION CONTAINING SAME
    Publication number: 20130184190
    Abstract: Provided is an antioxidant composition, including: a compound (A) represented by the following general formula (1); and an amine-based antioxidant (B) and/or a phenol-based antioxidant (C) other than the compound (A): (wherein R represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and n represents a number from 1 to 3.
    Type: Application
    Filed: August 26, 2011
    Publication date: July 18, 2013
    Applicant: Adeka Corporation of Tokyo
    Inventors: Yokio Tatsumi, Kazuhiro Umehara, Shinji Iino