Patents by Inventor Yukiko Asou

Yukiko Asou 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).

  • Sustained releasing drug comprising copolymers and process for preparing the same
    Patent number: 6419951
    Abstract: A sustained releasing drug which includes an effective component and a copolymer having a weight-average molecular weight of 1,000 to 100,000 which comprises, as repeating structure units, both of a succinimide unit represented by the structural formula (1) and a hydroxycarboxylic acid unit represented by the structural formula (2) wherein R is a methyl group or a hydrogen atom, and a process for preparing a copolymer which comprises a polymerization step of heating a mixture of aspartic acid and a cyclic ester compound.
    Type: Grant
    Filed: November 6, 2001
    Date of Patent: July 16, 2002
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Hosei Shinoda, Yukiko Asou, Hiroaki Tamatani
  • Copolymer and process for preparing the same
    Publication number: 20020048559
    Abstract: There are herein disclosed a copolymer having a weight-average molecular weight of 1,000 to 100,000 which comprises, as repeating structure units, both of a succinimide unit represented by the structural formula (1) 1
    Type: Application
    Filed: November 6, 2001
    Publication date: April 25, 2002
    Inventors: Hosei Shinoda, Yukiko Asou, Hiroaki Tamatani
  • Resin composition
    Patent number: 6372844
    Abstract: There are here disclosed a resin composition comprising a block or a graft copolymer (A) having a polyamino acid as a hydrophilic segment (a-1), and a degradable polymer as a hydrophobic segment (a-2), and a resin (B); and a method of accelerating the hydrolysis of a resin and inhibiting the heat deterioration thereof by mixing this copolymer (A) with the resin (B).
    Type: Grant
    Filed: March 28, 2000
    Date of Patent: April 16, 2002
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Hosei Shinoda, Yukiko Asou, Hiroaki Tamatani
  • Copolymer and process for preparing the same
    Patent number: 6372880
    Abstract: A copolymer having a weight-average molecular weight of 1,000 to 100,000 which comprises, as repeating structure units, both of a succinimide unit represented by the structural formula (1) and a hydroxycarboxylic acid unit represented by the structural formula (2) wherein R is a methyl group or a hydrogen atom, and a process for preparing a copolymer which comprises a polymerization step of heating a mixture of aspartic acid and a cyclic ester compound.
    Type: Grant
    Filed: December 23, 1998
    Date of Patent: April 16, 2002
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Hosei Shinoda, Yukiko Asou, Hiroaki Tamatani
  • Medical composition of hydroxy acid-based oligomer
    Patent number: 6342241
    Abstract: A medical composition is here disclosed which comprises a hydroxy acid-based oligomer (A) and a drug (B), wherein the hydroxy acid-based oligomer (A) is an oligomer in which the carboxylic acid-terminals are at least partially esterified, and the oligomer (A) has a function of becoming pH 5 to 8 when administered into an organism, and the oligomer (A) shows fluidity at 25° C. This composition sustainedly releases the drug (B) to deliver it into an organism by a syringe or the like, and scarcely gives rise to irritation, inflammation or the like.
    Type: Grant
    Filed: January 21, 2000
    Date of Patent: January 29, 2002
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Yukiko Asou, Hosei Shinoda, Hiroaki Tamatani