Patents by Inventor Ryousuke Kaneshige

Ryousuke Kaneshige 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).

  • Patent number: 6214779
    Abstract: The present invention is directed towards a lubricating oil comprising a random copolymer of an &agr;-olefin/aromatic vinyl compound, wherein the copolymer has a viscosity falling within a specific range and comprises ethylene, an aromatic vinyl compound, and optionally an &agr;-olefin. The lubricating oil possesses excellent viscosity properties, thermal stability, oxidation stability, abrasion resistance, and compatibility with lubricating oil additives. The random copolymer having a different viscosity range is useful as a viscosity index improver and a compatibilizing agent for a lubricating oil. The invention also provides a lubricating oil composition comprising a base oil and the viscosity index improver or the compatibilizing agent. The invention further provides a fuel oil composition comprising a fuel oil fluidity improver based on the above random copolymer having a different viscosity range and a middle fraction fuel oil having a boiling point of 150 to 400° C.
    Type: Grant
    Filed: July 7, 1998
    Date of Patent: April 10, 2001
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Ryousuke Kaneshige, Hideki Hirano, Masahide Tanaka, Kenichi Morizono, Keiji Okada
  • Patent number: 5013867
    Abstract: There is provided a liquid oxidatively modified ethylenic random copolymer, which is an oxidatively modified product of a liquid ethylenic random coplymer comprising 20 to 80 mol % of ethylene and 80 to 20 mol % of .alpha.-olefin, and has (i) a number average molecular weight (Mn) in the range of from 200 to 10,000, (ii) a molecular weight distribution (Mw/Mn) given as weight average molecular weight (Mw) divided by number average molecular weight (Mn) in the range of up to 4, and (iii) an oxygen content of from 0.1 to 20% by weight, an acid value of from 0.1 to 50, and a saponification value of from 0.1 to 100. It is prepared by contacting a corresponding ethylenic random copolymer with oxygen-containing gas at 100.degree.-250.degree. C.
    Type: Grant
    Filed: March 9, 1990
    Date of Patent: May 7, 1991
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Tatsuo Kinoshita, Shuji Minami, Kinya Mizui, Ryousuke Kaneshige
  • Patent number: 4943658
    Abstract: There is provided a liquid oxidatively modified ethylenic random copolymer, which is an oxidatively modified product of a liquid ethylenic random copolymer comprising 20 to 80 mol % of ethylene and 80 to 20 mol % of .alpha.-olefin, and has (i) a number average molecular weight (Mn) in the range of from 200 to 10,000, (ii) a molecular weight distribution (Mw/Mn) given as weight average molecular weight (Mw) divided by number average molecular weight (Mn) in the range of up to 4, and (iii) an oxygen content of from 0.1 to 20% by weight, an acid value of from 0.1 to 50, and a saponification value of from 0.1 to 100. It is prepared by contacting a corresponding ethylenic random copolymer with oxygen-containing gas at 100.degree.-250.degree. C.
    Type: Grant
    Filed: March 28, 1988
    Date of Patent: July 24, 1990
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Tatsuo Kinoshita, Shuji Minami, Kinya Mizui, Ryousuke Kaneshige
  • Patent number: 4922046
    Abstract: A liquid polymer composition contains:(A) a liquid low molecular weight ethylene-.alpha.-olefin copolymer comprising 30 to 70 mol % of ethylene component units and 30 to 70 mol % of .alpha.-olefin component units, having a number average molecular weight (Mn) in the range of 150 to 10000, with a Q-value (weight average molecular weight/number average molecular weight) of 3 or less, and(B) A high molecular weight polymer which is in an amount of 0.05 to 100 parts by weight based on 100 parts by weight of the liquid low molecular weight polymer (A), having a number average molecular weight (Mn) of 20000 or higher, witha Q-value of 6 or less, and is soluble in the liquid low molecular weight polymer (A), which liquid polymer composition has an excellent viscosity characteristic, lubrication characteristic, and oxidation stability, without denaturation by moisture adsorption, and therefore, is suitable for use as an actuation oil.
    Type: Grant
    Filed: March 10, 1988
    Date of Patent: May 1, 1990
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Tatsuo Kinoshita, Shuji Minami, Ryousuke Kaneshige
  • Patent number: 4877557
    Abstract: Disclosed is a lubricating oil composition comprising, as indispensable components, (A) a synthetic hydrocarbon lubricating oil, (B) a load-withstanding additive and (C) a liquid modified ethylene/.alpha.-olefin random copolymer. In this lubricating oil composition, the load-withstanding oil is homogeneously and stably incorporated. This lubricating oil is significant in that the poor compatibity with a load-withstanding additive, which is the defect of synthetic hydrocarbon lubricating oils, is effectively overcome.
    Type: Grant
    Filed: February 11, 1988
    Date of Patent: October 31, 1989
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Ryousuke Kaneshige, Kinya Mizui