Patents by Inventor Tamio Akada

Tamio Akada 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).

  • Grease composition
    Patent number: 7256163
    Abstract: The grease composition of the present invention contains, in a lubricant base oil, 0.01 to 10% by mass of a fatty acid salt, 0.01 to 10% by mass of carbonate, 2 to 30% by mass of a thickener, and 0.1 to 20% by mass of a sulfur type extreme-pressure agent on the basis of the total amount of composition.
    Type: Grant
    Filed: November 21, 2002
    Date of Patent: August 14, 2007
    Assignee: Nippon Oil Corporation
    Inventors: Tamio Akada, Akihiko Kominami, Mitsuru Kishimoto, Akira Kohno, Hirotsugu Kinoshita, Souichi Nomura, Takashi Arai, Kiyomi Sakamoto
  • Perfluoropolyether compound and lubricant and magnetic disk using same
    Publication number: 20060052262
    Abstract: A compound of the formula (I), a lubricant and a magnetic disk using the compound A—CH2CF2O(CF2CF2O)m-(CF2O)n-CF2CH2—B ??(I) wherein A is amino group having hydroxyl group, B is hydroxyl group, or amino group having or not having hydroxyl group, wherein m is a real number of 5 to 36, and n is a real number of from 4 to 30.
    Type: Application
    Filed: October 1, 2003
    Publication date: March 9, 2006
    Applicant: MATSUMURA OIL RESEARCH CORP.
    Inventors: Tamio Akada, Nagayoshi Kobayashi, Yoshinobu Fujii
  • Phosphazene compounds and lubricants containing the same
    Patent number: 6608009
    Abstract: A phosphazene compound of the formula (1) or (5) which has an arrangement such that perfluoroxyalkylene units selected from —CF2O— and —CF2CF2O— are randomly distributed, the compound having a functional terminal group A or group G A—OCH2CF2O(CF2CF2O)p(CF2O)qCF2CH2O—A  (1) G—[OCH2CF2O(CF2CF2O)p(CF2O)qCF2CH2OH]6-z  (5) wherein A is a group of the formula (a) and G is a group of the formula (g) shown in the specification, and a lubricant containing at least one of the phosphazene compounds of the formulas (1) and (5).
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: August 19, 2003
    Assignee: Matsumura Oil Research Corp.
    Inventors: Tamio Akada, Yoshinobu Fujii, Nagayoshi Kobayashi, Rie Fujimoto
  • Grease composition
    Publication number: 20030139302
    Abstract: The grease composition of the present invention contains, in a lubricant base oil, 0.01 to 10% by mass of a fatty acid salt, 0.01 to 10% by mass of carbonate, 2 to 30% by mass of a thickener, and 0.1 to 20% by mass of a sulfur type extreme-pressure agent on the basis of the total amount of composition.
    Type: Application
    Filed: November 21, 2002
    Publication date: July 24, 2003
    Applicant: NIPPON OIL CORPORATION
    Inventors: Tamio Akada, Akihiko Kominami, Mitsuru Kishimoto, Akira Kohno, Hirotsugu Kinoshita, Souichi Nomura, Takashi Arai, Kiyomi Sakamoto
  • Lubricant for magnetic recording medium
    Patent number: 6541431
    Abstract: The present invention provides a lubricant for magnetic recording medium which comprises, as an effective component, a phosphazene compound of formula [N═P[O(C6H4)—(A)z—R]a[OCH2—(B)xH]b]y  (1) wherein A is —C6H4— or —OC6H4—, B is fluorine-containing alkylene group, R is hydrogen atom, fluorine atom, C1-4 alkyl, C1-4 alkoxy or C1-4 haloalkyl, a and b are a real number of 0 to 2, satisfying a+b=2, x is 1, 2, 3 or 4, y is 3 or 4, and z is 0 or 1.
    Type: Grant
    Filed: January 22, 2001
    Date of Patent: April 1, 2003
    Assignee: Matsumura Oil Research Corp.
    Inventors: Tamio Akada, Yoshinobu Fujii, Nagayoshi Kobayashi, Rie Fujimoto
  • Phosphazene compounds and lubricants containing the same
    Publication number: 20020183211
    Abstract: A phosphazene compound of the formula (1) or (5) which has an arrangement such that perfluoroxyalkylene units selected from —CF2O— and —CF2CF2O— are randomly distributed, the compound having a functional terminal group A or group G
    Type: Application
    Filed: March 20, 2002
    Publication date: December 5, 2002
    Inventors: Tamio Akada, Yoshinobu Fujii, Nagayoshi Kobayashi, Rie Fujimoto
  • Super highly radiation-resistant grease
    Patent number: 4753741
    Abstract: A radiation-resistant grease that is stable under elevated temperatures is disclosed. The grease is prepared by mixing a bentonite-based thickening agent with a base oil composed of m-(m-phenoxyphenoxy)diphenyl, pentaphenyl ether, a monoalkyltriphenyl ether or a monoalkyltetraphenyl ether (provided that the alkyl group contains 6-20 carbon atoms). To the mixture is added, if necessary, a gelling aid composed of an aliphatic alcohol, an aliphatic ketone and/or an aliphatic carbonate ester.
    Type: Grant
    Filed: May 15, 1987
    Date of Patent: June 28, 1988
    Assignees: Japan Atomic Energy Research Institute, Matsumura Oil Research Corporation
    Inventors: Kazuo Arakawa, Tsuneo Sasuga, Miyuki Hagiwara, Naohiro Hayakawa, Kenzo Yoshida, Hiroshi Nakanishi, Mitsuo Hirohama, Tetsuya Yagi, Tamio Akada, Takao Soda