Patents by Inventor Minako Yasu

Minako Yasu 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).

  • Preparation of optically active esters
    Patent number: 5032523
    Abstract: A process for separating an optically active substanbce comprising the steps of:(a) effecting a transesterification reaction between an ester of a linear or branched aliphatic racemic alcohol and an alcohol in an organic solvent containing an enzyme suspended therein; and(b) separating an optically active compound from the resultant reaction mixture.
    Type: Grant
    Filed: January 12, 1988
    Date of Patent: July 16, 1991
    Assignee: Lion Corporation
    Inventors: Masaki Amano, Haruhiko Toda, Minako Yasu, Toshiyuki Koyagi
  • Liquid crystal membrane
    Patent number: 4968539
    Abstract: A polymer membrane for delivering a drug is provided. The membrane is capable of regulating the delivery of the drug and comprises (A) a porous hydrophobic polymer membrane having a pore diameter of not larger than 3 .mu.m and a porosity of 10 to 90% which is immobilized with (B) a specific liquid crystal-forming compound having a gel/liquid crystal transition temperature in the range of 25.degree. to 45.degree. C.
    Type: Grant
    Filed: November 30, 1988
    Date of Patent: November 6, 1990
    Assignee: Lion Corporation
    Inventors: Takao Aoyagi, Shuji Sato, Minako Yasu, Iwao Nozawa, Yousuke Suzuki
  • Hiar cosmetic composition
    Patent number: 4885159
    Abstract: A hair cosmetic composition comprising a polymer vesicle obtained from the polymerization of a surfactant monomer vesicle haing quaternary ammonium as a cation moiety and a polymerizable anion as a counter ion.
    Type: Grant
    Filed: January 28, 1988
    Date of Patent: December 5, 1989
    Assignee: Lion Corporation
    Inventors: Miyuki Miyake, Haruhiko Toda, Minako Yasu