Patents Assigned to Takasago Perfumery Co., Ltd.
  • 5-Acetyl-1,2,6-trimethyltricyclo[5,3,2,0.sup.2,7 ]dodeca-5-ene perfume composition
    Patent number: 3988366
    Abstract: 5-Acetyl-1,2,6-trimethyltricyclo[5,3,2,0.sup.2,7 ]dodeca-5-ene having the formula (I) ##SPC1##and a process for producing this compound. This compound is useful as a perfume.
    Type: Grant
    Filed: October 14, 1975
    Date of Patent: October 26, 1976
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Akira Nagakura, Susumu Akutagawa, Haruki Kurihara
  • 1,2,6-Trimethyltricyclo[5,3,2,0.sup.2,7 ]dodeca-5-one perfume composition
    Patent number: 3984355
    Abstract: 1,2,6-Trimethyltricyclo[5,3,2,0.sup.2,7 ]dodeca-5-one having the formula (I) ##SPC1##and a process for producing this compound. This compound is useful as a perfume.
    Type: Grant
    Filed: November 13, 1975
    Date of Patent: October 5, 1976
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Akira Nagakura, Susumu Akutagawa, Haruki Kurihara
  • Tricyclic hydrocarbon and process for producing the same
    Patent number: 3970593
    Abstract: 5,6-Epoxy-1,2,6-trimethyltricyclo[5,3,2,0.sup.2,7 ]dodecane having the formula (I) ##SPC1##and a process for producing this compound. This compound is useful as a perfume.
    Type: Grant
    Filed: December 27, 1974
    Date of Patent: July 20, 1976
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Akira Nagakura, Susumu Akutagawa, Haruki Kurihara
  • Process for preparing parabenzoquinones
    Patent number: 3966776
    Abstract: A process for preparing parabenzoquinones which comprises oxidizing alkylphenols with oxygen or an oxygen-containing gas in the presence of cobalt di-(salcylal)-3,3'-diimino-di-n-propylamine derivatives and an amine is disclosed.
    Type: Grant
    Filed: September 10, 1974
    Date of Patent: June 29, 1976
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Takashi Kato, Toru Yamanaka, Akira Komatsu
  • 5-Acetyl-1,2,6-trimethyltricyclo[5,3,2,0.sup.2,7 ]dodeca-5-ene
    Patent number: 3963782
    Abstract: 5-Acetyl-1,2,6-trimethyltricyclo[5,3,2,0.sup.2,7 ]dodeca-5-ene having the formula (I) v,2/14And a process for producing this compound. This compound is useful as a perfume.
    Type: Grant
    Filed: December 27, 1974
    Date of Patent: June 15, 1976
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Akira Nagakura, Susumu Akutagawa, Haruki Kurihara
  • 1,2,6-Trimethyltricyclo[5,3,2,0.sup.2,7 ]dodeca-5-one
    Patent number: 3962340
    Abstract: 1,2,6-Trimethyltricyclo[5,3,2,0.sup.2,7 ]dodeca-5-one having the formula (I) ##SPC1##and a process for producing this compound. This compound is useful as a perfume.
    Type: Grant
    Filed: December 27, 1974
    Date of Patent: June 8, 1976
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Akira Nagakura, Susumu Akutagawa, Haruki Kurihara
  • Process for preparing alkali metal salts of carbazole
    Patent number: 3944565
    Abstract: Alkali metal salts of carbazole are prepared by heating carbazole and alkali metal hydroxides with stirring in an organic solvent which forms an azeotrope with water, and removing the resulting water as an azeotrope from the reaction system.The resulting alkali metal salts of carbazole are useful as a material for the preparation of vinyl carbazole for use in electrophotography. The reaction is promoted particularly by the presence of a small amount of water in the reaction system prior to heating.
    Type: Grant
    Filed: October 26, 1973
    Date of Patent: March 16, 1976
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Hiroshi Otsuki, Kenzo Sakuma, Isamu Matsuzawa