Patents by Inventor Kazutoshi Doki

Kazutoshi Doki 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).

  • Urethane (meth)acrylate oligomer and sheet using the same
    Patent number: 8932419
    Abstract: Disclosed is a urethane (meth)acrylate oligomer which is obtained by reacting at least one polyoxyalkylene polyol (A), at least one monool (B1) soluble in the component (A) and/or at least one silane coupling agent (B2) reactive with an isocyanate group, at least one polyisocyanate (C) and at least one hydroxylated mono (meth)acrylate compound (D) at a ratio at which the equivalent weights of hydroxy groups, active hydrogen groups and isocyanate groups in the respective components satisfy the following formulae (1)-(3). The urethane (meth)acrylate oligomer does not substantially contain an unreacted isocyanate group. B(active hydrogen)+D(OH)=C(NCO)?A(OH) (1) 1.05?C(NCO)/A(OH)?2 (2) {C(NCO)?2A(OH)+2m}×0.35?D(OH)?{C(NCO)?2A(OH)+2m}×0.
    Type: Grant
    Filed: December 31, 2013
    Date of Patent: January 13, 2015
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Yoshinobu Ogawa, Kazutoshi Doki, Osamu Kawata, Yoshihiro Tani
  • URETHANE (METH)ACRYLATE OLIGOMER AND SHEET USING THE SAME
    Publication number: 20140110048
    Abstract: Disclosed is a urethane (meth)acrylate oligomer which is obtained by reacting at least one polyoxyalkylene polyol (A), at least one monool (B1) soluble in the component (A) and/or at least one silane coupling agent (B2) reactive with an isocyanate group, at least one polyisocyanate (C) and at least one hydroxylated mono (meth)acrylate compound (D) at a ratio at which the equivalent weights of hydroxy groups, active hydrogen groups and isocyanate groups in the respective components satisfy the following formulae (1)-(3). The urethane (meth)acrylate oligomer does not substantially contain an unreacted isocyanate group. B(active hydrogen)+D(OH)=C(NCO)?A(OH) (1) 1.05?C(NCO)/A(OH)?2 (2) {C(NCO)?2A(OH)+2m}×0.35?D(OH)?{C(NCO)?2A(OH)+2m}×0.
    Type: Application
    Filed: December 31, 2013
    Publication date: April 24, 2014
    Applicant: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Yoshinobu OGAWA, Kazutoshi DOKI, Osamu KAWATA, Yoshihiro TANI
  • URETHANE (METH)ACRYLATE OBLGOMER AND SHEET USING THE SAME
    Publication number: 20100273909
    Abstract: Disclosed is a urethane (meth)acrylate oligomer which is obtained by reacting at least one polyoxyalkylene polyol (A), at least one monool (B1) soluble in the component (A) and/or at least one silane coupling agent (B2) reactive with an isocyanate group, at least one polyisocyanate (C) and at least one hydroxylated mono(meth)acrylate compound (D) at a ratio at which the equivalent weights of hydroxy groups, active hydrogen groups and isocyanate groups in the respective components satisfy the following formulae (1)-(3). The urethane (meth)acrylate oligomer does not substantially contain an unreacted isocyanate group. B(active hydrogen)+D(OH)=C(NCO)?A(OH) (1) 1.05?C(NCO)/A(OH)?2 (2) {C(NCO)?2A(OH)+2 m}×0.35?D(OH)?{C(NCO)?2A(OH)+2 m}×0.
    Type: Application
    Filed: August 3, 2007
    Publication date: October 28, 2010
    Inventors: Yoshinobu Ogawa, Kazutoshi Doki, Osamu Kawata, Yoshihiro Tani