Patents by Inventor Kenji Tanimoto

Kenji Tanimoto 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: 4023080
    Abstract: A circuit for synchronizing a motor at the receiving end of a communication link with one at the transmitting end thereof, the circuit preventing an indication of synchronization until the receiving end motor reaches its rated speed.
    Type: Grant
    Filed: April 7, 1975
    Date of Patent: May 10, 1977
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Kenji Tanimoto
  • Patent number: 3985819
    Abstract: A process for producing alkylnaphthalenes by alkylating naphthalene with an olefin having 2 to 4 carbon atoms, which comprises (1) introducing the olefin into a solution of crude naphthalene containing thianaphthene as an impurity in a solvent having a boiling point sufficiently different from the boiling point of the naphthalene and alkylnaphthalenes produced that the solvent is separable by distillation in the presence of (i) an aluminum chloride complex consisting of (a) aluminum chloride, (b) hydrogen chloride and (c) an alkylated benzene or naphthalene, or (ii) a solid aluminum chloride which is dissolved into the reaction solution by adding gaseous hydrogen chloride simultaneously with or prior to the introducing of the olefin, (2) aging the reaction solution, and (3) recovering the resulting alkylnaphthalenes, whereby alkylnaphthalenes, containing as monoalkylnaphthalenes a predominant amount of a .beta.-monoalkylnaphthalene, are obtained in a high yield.
    Type: Grant
    Filed: October 8, 1974
    Date of Patent: October 12, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Katsumi Kobayashi, Iwao Dohgane, Hiromichi Okabe, Kenji Tanimoto
  • Patent number: 3969420
    Abstract: Resorcinol and hydroquinone are recovered in mixture at a high purity from a solution containing resorcinol and hydroquinone, especially, a solution resulting from cleavage of oxidation products of isopropylbenzene and successive distillation of the cleavage product thereby to remove lower and higher boiling components therefrom, by adding 0.
    Type: Grant
    Filed: July 2, 1973
    Date of Patent: July 13, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hideaki Suda, Iwao Dohgane, Takashi Chinuki, Kenji Tanimoto, Hirokazu Hosaka, Yukimichi Nakao, Yuji Ueda, Seiya Imada, Hideki Yanagihara, Kunihiko Tanaka
  • Patent number: 3953521
    Abstract: Meta-and/or paradiisopropylbenzene dihydroperoxides are continuously produced by oxidizing meta-and/or paradiisopropylbenzenes in liquid phase through contact with oxygen or a gas containing oxygen, while keeping the concentration of meta-and/or paradiisopropylbenzene monohydroperoxides of the oxidation product solution in a range of 20 to 40% by weight.
    Type: Grant
    Filed: June 27, 1975
    Date of Patent: April 27, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hideaki Suda, Iwao Dohgane, Takashi Chinuki, Kenji Tanimoto, Hirokazu Hosaka, Yukimichi Nakao, Yuji Ueda, Seiya Imada, Hideki Yanagihara, Kunihiko Tanaka
  • Patent number: 3952037
    Abstract: An aluminum halide complex of an aluminum halide, a hydrogen halide and an alkylbenzene is prepared by continuously feeding a gaseous hydrogen halide to a reaction zone comprising aluminum and an alkylbenzene and continuously taking the resulting aluminum halide complex out of the reaction zone, the byproduced hydrogen gas being taken out of the reaction zone, and aluminum and the alkylbenzene being fed continuously or intermittently to the reaction zone.
    Type: Grant
    Filed: May 24, 1973
    Date of Patent: April 20, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hiroshi Yoshitake, Kenji Tanimoto, Norio Kotera
  • Patent number: 3950431
    Abstract: Impurities, that is, by-products, in an oxidation product solution obtained by oxidation of diisopropylbenzene by molecular oxygen or in the oxidation product solution freed from diisopropylbenzene dihydroperoxide, are removed by extracting the by-products such as carbinols, ketones and styrenes from the solution with a mixture of an aqueous alkaline solution and at least one of alcohols having 1 to 3 carbon atoms such as methanol, ethanol, and isopropanol, as an extracting reagent at a temperature of 20.degree. to 80.degree.C.
    Type: Grant
    Filed: September 20, 1973
    Date of Patent: April 13, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hideaki Suda, Iwao Dohgane, Takashi Chinuki, Kenji Tanimoto, Hirokazu Hosaka, Yukimichi Nakao, Yuji Ueda, Seiya Imada, Hideki Yanagihara, Kunihiko Tanaka
  • Patent number: 3937883
    Abstract: For use with a phase synchronizing circuit which synchronizes an A-C motor at the receiving end of a communication link with one at the transmitting end thereof by repeatedly applying to the main coils of the receiving end motor, reduced frequency signals having a lower frequency than the rated frequency thereof to thereby reduce the phase deviation between the receiving and transmitting end motors, the improvement of a braking circuit for enhancing the speed and accuracy of the phase synchronizing circuit, the braking circuit including means for applying a direct-current voltage to the main coils of the receiving end motor prior to or in lieu of each of the reduced frequency signals.
    Type: Grant
    Filed: July 26, 1974
    Date of Patent: February 10, 1976
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Kenji Tanimoto
  • Patent number: 3933921
    Abstract: In a process for the production of hydroperoxides by the oxidation of an aromatic hydrocarbon having at least one tertiary carbon atom with oxygen or an oxygen containing gas in the presence of an aqueous alkaline solution, an improvement is made in that the oxidation is effected in an emulsion phase which is caused by powerfully mixing all or a part of the materials to be brought into the oxidation reaction only by the aid of the hydroperoxides formed in the reaction, whereby enhancing the reaction rate with safety.
    Type: Grant
    Filed: June 18, 1973
    Date of Patent: January 20, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hideaki Suda, Iwao Dohgane, Takashi Chinuki, Kenji Tanimoto, Hirokazu Hosaka, Yukimichi Nakao, Yuji Ueda, Seiya Imada, Hideki Yanagihara, Kunihiko Tanaka
  • Patent number: 3932528
    Abstract: Dihydroperoxides of dialkylaromatic hydrocarbons are separated in high yield from an aqueous alkaline solutions of hydroperoxides containing the dihydroperoxides by adding 0.01 to 1 % by weight of a compound having a nitrogen base, such as ammonia and aromatic amines, to the solution, based on the weight of the solution, thereby stabilizing the dihydroperoxides in the solution, and separating the dihydroperoxides therefrom by extraction.
    Type: Grant
    Filed: August 27, 1973
    Date of Patent: January 13, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hideaki Suda, Iwao Dohgane, Takashi Chinuki, Kenji Tanimoto, Hirokazu Hosaka, Yukimichi Nakao, Yuji Ueda, Seiya Imada, Hideki Yanagihara, Kunihiko Tanaka