Patents by Inventor Takami Ooe

Takami Ooe 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).

  • Highly purified tocopheryl phosphate, process for producing the same, analytical method therefor and cosmetic
    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
  • High- purity tocopherol phosphates, process for the preparation thereof, methods for analysis thereof, and cosmetics
    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