Patents by Inventor Harumi Asai

Harumi Asai 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).

  • Novel phenol antioxidants
    Patent number: 4059563
    Abstract: A phenol derivative of the general formula ##STR1## wherein R is a hydrogen atom or an alkyl group containing 1 to 4 carbon atoms, and X and Y, which may be identical or different, each represent a cyclopentyl or cyclohexyl group.
    Type: Grant
    Filed: September 13, 1976
    Date of Patent: November 22, 1977
    Assignee: Nippon Zeon Co. Ltd.
    Inventors: Kuniaki Goto, Harumi Asai, Tadao Natsuume
  • Novel phenol derivatives
    Patent number: 4008284
    Abstract: A phenol derivative of the general formula ##STR1## wherein R is a hydrogen atom or an alkyl group containing 1 to 4 carbon atoms, and X and Y, which may be identical or different, each represent a cyclopentyl or cyclohexyl group.
    Type: Grant
    Filed: June 9, 1975
    Date of Patent: February 15, 1977
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Kuniaki Goto, Harumi Asai, Tadao Natsuume
  • Process for preparing a thermoplastic resin
    Patent number: 3968088
    Abstract: A process for preparing a substantially gel-free thermoplastic resin having a softening point of 50.degree.-180.degree.C., an iodine value not exceeding 180 and a Gardner color of not more than 5 by heating at a temperature of 250.degree.-300.degree.C. a solution of a monomeric mixture consisting of 90-65% by weight of a cyclopentadiene type monomer and 10-40% by weight of a chain conjugated diolefin monomer of 4-5 carbon atoms at a monomer concentration of 70-95% by weight in a hydrocarbon solvent inert to thermal polymerization conditions to effect the thermal polymerization of the monomeric mixture and thereafter recovering the resulting polymer from the solvent.
    Type: Grant
    Filed: April 29, 1974
    Date of Patent: July 6, 1976
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Harumi Asai, Akira Wada