Patents by Inventor Itsuo Furuoya

Itsuo Furuoya 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).

  • Choline oxidase and method for producing the same
    Patent number: 5187088
    Abstract: A novel choline oxidase being thermostable at 50.degree. C. at pH 7 to 9 is disclosed. A method for producing the enzyme by using actinomycetes is also disclosed.
    Type: Grant
    Filed: September 5, 1991
    Date of Patent: February 16, 1993
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Itsuo Furuoya, Takashi Suzuki, Takeshi Takahashi
  • Novel choline oxidase and method for producing the same
    Patent number: 5079157
    Abstract: A novel choline oxidase being thermostable at 50.degree. C. at pH 7 to 9 is disclosed. A method for producing the enzyme by using actinomycetes is also disclosed.
    Type: Grant
    Filed: August 25, 1989
    Date of Patent: January 7, 1992
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Itsuo Furuoya, Takashi Suzuki, Takeshi Takahashi
  • Epoxy resin hardening agents
    Patent number: 4461878
    Abstract: Disclosure is a novel hardening agent for epoxy resins which has quick cold hardening ability and high safety for human bodies. This hardening agent has the general formula: ##STR1## Epoxy resins hardened with this hardening agent have excellent mechanical properties at high temperatures.
    Type: Grant
    Filed: October 28, 1983
    Date of Patent: July 24, 1984
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Ichiro Minato, Koichi Shibata, Itsuo Furuoya
  • Process for producing unsaturated aliphatic dinitriles
    Patent number: 4436671
    Abstract: Unsaturated aliphatic dinitriles such as fumaronitrile and maleonitrile can be produced in high yields by ammoxidation of C.sub.4 straight-chain hydrocarbons in the presence of a catalyst containing as active components:[A] at least one kind of oxides of vanadium and tungsten, and[B](1) at least one kind of oxides of antimony, phosphorus and boron, and/or(2) at least one kind of oxides of chromium, nickel, aluminum and silicon.
    Type: Grant
    Filed: February 2, 1982
    Date of Patent: March 13, 1984
    Assignee: Takeda Chemical Industries, Limited
    Inventors: Itsuo Furuoya, Yuzuru Kitazawa
  • Method for producing aromatic nitriles
    Patent number: 4336205
    Abstract: Aromatic nitriles can be produced in high yields by ammoxidation of an alkyl-substituted aromatic compound in the presence of a catalyst containing oxides of (1) vanadium, (2) antimony and (3) at least one of uranium and chromium, even when concentration of the starting aromatic compound in the starting gas is high or mixing ratio of ammonia to the starting aromatic compound is reduced to the neighborhood of the stoichiometric equivalent.
    Type: Grant
    Filed: March 31, 1981
    Date of Patent: June 22, 1982
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Isatsugu Onishi, Itsuo Furuoya, Ichiro Minato
  • Production of maleic anhydride
    Patent number: 4298533
    Abstract: Maleic anhydride is obtained in a high yield as well as in a high purity by oxidation of a hydrocarbon of not less than four carbon atoms in gaseous phase in the presence of a catalyst comprising (a) vanadium oxide, (b) phosphorus oxide, (c) thallium oxide and/or alkaline earth metal oxide, and if necessary, further containing (d) iron oxide.
    Type: Grant
    Filed: June 13, 1978
    Date of Patent: November 3, 1981
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Koji Moriya, Itsuo Furuoya
  • Production of maleic anhydride
    Patent number: 4108874
    Abstract: Maleic anhydride is obtained in a high yield as well as in a high purity by oxidation of a hydrocarbon of not less than four carbon atoms in gaseous phase in the presence of a catalyst comprising (a) vanadium oxide, (b) phosphorus oxide, (c) thallium oxide and/or alkaline earth metal oxide, and if necessary, further containing (d) iron oxide.
    Type: Grant
    Filed: March 21, 1975
    Date of Patent: August 22, 1978
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Koji Moriya, Itsuo Furuoya
  • Catalyst for the production of isoprene
    Patent number: 4092372
    Abstract: A solid catalyst comprising (1) silver ion, (2) aluminum oxide and (3) silicon oxide, which may further comprise, as the fourth ingredient(s), the oxide and/or ion of one or more of transition elements, alkaline earth metals, boron, thallium, tin, lead and phosphorus gives a high yield of isoprene in the reaction of isobutylene and formaldehdye and has a prolonged catalytic activity.
    Type: Grant
    Filed: April 6, 1976
    Date of Patent: May 30, 1978
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Itsuo Furuoya, Atsuo Kobayashi, Katsuhiko Ogino