Patents by Inventor Eizaburo Ueno

Eizaburo Ueno 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).

  • Polycarbonate diol
    Patent number: 8686107
    Abstract: A polycarbonate diol comprising repeating units represented by the following formula (A) and a terminal hydroxy group, 60-100 mol % of the repeating units represented by the formula (A) being repeating units represented by the following formula (B) or (C). The amount of the repeating units represented by the formula (B) is 60-100 mol % based on the total amount of the repeating units represented by the formula (A). The polycarbonate diol has a terminal primary OH ratio of 95% or higher. (A) (In the formula, R represents a C2-12 divalent aliphatic or alicyclic hydrocarbon.
    Type: Grant
    Filed: November 4, 2008
    Date of Patent: April 1, 2014
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Tetsuo Masubuchi, Eizaburo Ueno
  • Polycarbonate diol with ease of reaction stabilization
    Patent number: 8168728
    Abstract: A polycarbonate diol comprising repeating units represented by the following formula (A) and a terminal hydroxy group. It is characterized in that 60-100 mol % of the repeating units represented by the formula (A) are repeating units represented by the following formula (B) or (C), the amount of the repeating units represented by the formula (B) is 10-50 mol %, excluding 50 mol %, based on the total amount of the repeating units represented by the formula (A), and the polycarbonate diol has a terminal primary OH ratio of 95-98.5%. (A) (In the formula, R represents a C2-12 divalent aliphatic or alicyclic hydrocarbon.
    Type: Grant
    Filed: November 4, 2008
    Date of Patent: May 1, 2012
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Tetsuo Masubuchi, Eizaburo Ueno
  • POLYCARBONATE DIOL WITH EASE OF REACTION STABILIZATION
    Publication number: 20100292497
    Abstract: A polycarbonate diol comprising repeating units represented by the following formula (A) and a terminal hydroxy group. It is characterized in that 60-100 mol % of the repeating units represented by the formula (A) are repeating units represented by the following formula (B) or (C), the amount of the repeating units represented by the formula (B) is 10-50 mol %, excluding 50 mol %, based on the total amount of the repeating units represented by the formula (A), and the polycarbonate diol has a terminal primary OH ratio of 95-98.5%. (A) (In the formula, R represents a C2-12 divalent aliphatic or alicyclic hydrocarbon.
    Type: Application
    Filed: November 4, 2008
    Publication date: November 18, 2010
    Applicant: ASAHI KASEI CHEMICALS CORPORATION
    Inventors: Tetsuo Masubuchi, Eizaburo Ueno
  • POLYCARBONATE DIOL
    Publication number: 20100261852
    Abstract: A polycarbonate diol comprising repeating units represented by the following formula (A) and a terminal hydroxy group, 60-100 mol % of the repeating units represented by the formula (A) being repeating units represented by the following formula (B) or (C). The amount of the repeating units represented by the formula (B) is 60-100 mol % based on the total amount of the repeating units represented by the formula (A). The polycarbonate diol has a terminal primary OH ratio of 95% or higher. (A) (In the formula, R represents a C2-12 divalent aliphatic or alicyclic hydrocarbon.
    Type: Application
    Filed: November 4, 2008
    Publication date: October 14, 2010
    Applicant: ASAHI KASEI CHEMICALS CORPORATION
    Inventors: Tetsuo Masubuchi, Eizaburo Ueno