Patents by Inventor Yohei Kurata

Yohei Kurata 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: 8551509
    Abstract: A skin agent for external use and a cosmetic agent are provided, by transdermal administration of which expected actions and effects of ubiquinone derivatives, salts thereof, ubiquinones and ubiquinols are effectively obtained. The skin agent for external use includes a ubiquinone derivative or a salt thereof as an active ingredient. The ubiquinone derivative is represented by the formula (1): wherein R1 and R2 are each a hydrogen atom or a phosphoric group, at least one of R1 and R2 is a phosphoric group, and n is an integer in the range of 1 to 9.
    Type: Grant
    Filed: October 12, 2007
    Date of Patent: October 8, 2013
    Assignee: Showa Denko K.K.
    Inventors: Hirobumi Aoki, Yohei Kurata, Harumi Kamachi, Hirotsugu Nakanishi
  • Patent number: 7842726
    Abstract: To provide novel carnitine derivatives and salts thereof that are resistant to hydrolysis in the presence of aqueous media, and also provide external skin preparations and cosmetics that are excellent in storage stability, product life, skin affinity and percutaneous absorption properties. In particular, to provide novel ?-branched acyl carnitine derivatives and salts thereof, external skin preparations and cosmetics comprising specific ?-branched acyl carnitine derivatives and/or salts thereof.
    Type: Grant
    Filed: September 21, 2006
    Date of Patent: November 30, 2010
    Assignee: Showa Denko K.K.
    Inventors: Hirobumi Aoki, Harumi Kamachi, Yohei Kurata
  • Publication number: 20100074879
    Abstract: A skin agent for external use and a cosmetic agent are provided, by transdermal administration of which expected actions and effects of ubiquinone derivatives, salts thereof, ubiquinones and ubiquinols are effectively obtained. The skin agent for external use includes a ubiquinone derivative or a salt thereof as an active ingredient. The ubiquinone derivative is represented by the formula (1): wherein R1 and R2 are each a hydrogen atom or a phosphoric group, at least one of R1 and R2 is a phosphoric group, and n is an integer in the range of 1 to 9.
    Type: Application
    Filed: October 15, 2007
    Publication date: March 25, 2010
    Applicant: SHOWA DENKO K.K.
    Inventors: Hirobumi Aoki, Yohei Kurata, Harumi Kamachi, Hirotsugu Nakanishi
  • Publication number: 20090240070
    Abstract: Disclosed is a dermatological preparation that are safe and are excellent in inhibiting and removing skin pigmentation and in inhibiting skin roughness. A dermatological preparation comprising a tocopherol aminoalkylcarboxylate and/or a salt thereof, the tocopherol aminoalkylcarboxylate being represented by Formula (I): wherein R1 is a hydrogen atom or a lower alkyl group; R2 and R3 are each independently a hydrogen atom or a methyl group; X is a cycloalkylene group of 3 to 6 carbon atoms; and n is 0 or 1.
    Type: Application
    Filed: February 5, 2007
    Publication date: September 24, 2009
    Applicant: SHOWA DENKO K.K.
    Inventors: Harumi Kamachi, Hirobumi Aoki, Yohei Kurata, Jiro Takata
  • Publication number: 20090234153
    Abstract: To provide novel carnitine derivatives and salts thereof that are resistant to hydrolysis in the presence of aqueous media, and also provide external skin preparations and cosmetics that are excellent in storage stability, product life, skin affinity and percutaneous absorption properties. In particular, to provide novel ?-branched acyl carnitine derivatives and salts thereof, external skin preparations and cosmetics comprising specific ?-branched acyl carnitine derivatives and/or salts thereof.
    Type: Application
    Filed: September 21, 2006
    Publication date: September 17, 2009
    Applicant: SHOWA DENKO K.K.
    Inventors: Hirobumi Aoki, Harumi Kamachi, Yohei Kurata
  • Patent number: 6471940
    Abstract: A process is provided for preparing zeolite, particularly [Al]-SSZ-31, which comprises the steps of providing a mixture of a zeolite source, an aluminum-containing material, an organic structure directing substance, preferably at least one selected from the group consisting of N,N′-bis-triethyl-1,6-hexanediyl-diammonium dihydroxide, N,N′-bis-triethyl-1,7-heptanediyl-diammonium dihydroxide, N,N′-bis-triethyl-1,8-octanediyl-diammonium dihydroxide, N,N′-bis-triethyl-1,9-nonanediyl-diammonium dihydroxide, N,N′-bis-triethyl-1,10-decanediyl-diammonium dihydroxide, and their salts, and water; drying said mixture to form a powdered dry gel; and contacting and reacting said dry gel with steam at a saturated vapor pressure to produce an aluminum-containing zeolite [Al]-SSZ-31.
    Type: Grant
    Filed: September 27, 2000
    Date of Patent: October 29, 2002
    Assignees: Japan Chemical Innovation Institute, Secretary of Agency of Industrial Science and Technology
    Inventors: Yohei Kurata, Hideaki Hamada, Takaaki Hanaoka, Yoshihiro Sugi, Yoshihiro Kubota
  • Patent number: 6046181
    Abstract: Disclosed herein are a highly purified tocopheryl phosphate and/or a salt thereof (tocopheryl phosphates) wherein a P,P'-bistocopheryl hypophosphate and/or a salt thereof (P,P'-bistocopheryl diphoshates) is contained in a proportion of not higher than 3% by weight; a process for producing a highly purified tocopheryl phosphate and/or a salt thereof, which comprises the steps of reacting a tocopherol with an oxyphosphorus trihalide followed by treating with an acid or basic aqueous solution to thereby form tocopheryl phosphates (i) in which P,P'-bistocopheryl diphoshates (ii) formed as by-products are contained, hydrolyzing the P,P'-bistocopheryl diphoshates (ii) under acid condition, and, optionally, rendering the hydrolyzate neutral or basic under basic condition; and a method of analyzing tocopheryl phosphates, comprising analyzing a sample containing components (i) and (ii) with the use of a high-performance liquid chromatograph column packed with a gel of a polymethacrylate having, bonded thereto, long-ch
    Type: Grant
    Filed: June 29, 1999
    Date of Patent: April 4, 2000
    Assignee: Showa Denko K.K.
    Inventors: Yutaka Oonishi, Tsutomu Nozawa, Takami Ooe, Keisuke Mano, Naoaki Misu, Yohei Kurata, Shinobu Ito, Eiji Ogata
  • Patent number: 5965750
    Abstract: Disclosed herein are a highly purified tocopheryl phosphate and/or a salt thereof (tocopheryl phosphates) wherein a P,P'-bistocopheryl hypophosphate and/or a salt thereof (P,P'-bistocopheryl diphoshates) is contained in a proportion of not higher than 3% by weight; a process for producing a highly purified tocopheryl phosphate and/or a salt thereof, which comprises the steps of reacting a tocopherol with an oxyphosphorus trihalide followed by treating with an acid or basic aqueous solution to thereby form tocopheryl phosphates (i) in which P,P'-bistocopheryl diphoshates (ii) formed as by-products are contained, hydrolyzing the P,P'-bistocopheryl diphoshates (ii) under acid condition, and, optionally, rendering the hydrolyzate neutral or basic under basic condition; and a method of analyzing tocopheryl phosphates, comprising analyzing a sample containing components (i) and (ii) with the use of a high-performance liquid chromatograph column packed with a gel of a polymethacrylate having, bonded thereto, long-ch
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: October 12, 1999
    Assignee: Showa Denko K.K.
    Inventors: Yutaka Oonishi, Tsutomu Nozawa, Takami Ooe, Keisuke Mano, Naoaki Misu, Yohei Kurata, Shinobu Ito, Eiji Ogata
  • Patent number: 5110951
    Abstract: A method for producing L-ascorbic acid 2-phosphates, is disclosed which comprises phosphorylating L-ascorbic acid whose hydroxyl groups at the 5- and 6-positions are unprotected or protected with a protective group, or salts thereof, with a phosphorus oxyhalide to form corresponding L-ascorbic acid 2-phosphates, wherein a reaction mixture obtained after the phosphorylation reaction is heated to convert by-products derived from L-ascorbic acid into L-ascorbic acid, which again is subjected to the phosphorylation reaction with the phosphorus oxyhalide. The method produce L-ascorbic acid 2-phosphates in a high yield and at a high purity with simple operations.
    Type: Grant
    Filed: June 25, 1990
    Date of Patent: May 5, 1992
    Assignee: Showa Denko K.K.
    Inventors: Yoshimasa Ishimura, Yohei Kurata