Patents by Inventor Kunio Mayahara

Kunio Mayahara 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).

  • Method for recovering dimethyl sulfoxide from recovered resist remover
    Patent number: 11028047
    Abstract: A method for recovering dimethyl sulfoxide, including a step of contacting a recovered resist remover containing at least one compound selected from the group consisting of glycol ether, glycol and triol, and dimethyl sulfoxide with water and performing distillation.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: June 8, 2021
    Assignee: KURARAY CO., LTD.
    Inventors: Kunio Mayahara, Koji Tamura, Akinobu Takeda
  • METHOD FOR RECOVERING DIMETHYL SULFOXIDE FROM RECOVERED RESIST REMOVER
    Publication number: 20200131122
    Abstract: A method for recovering dimethyl sulfoxide, including a step of contacting a recovered resist remover containing at least one compound selected from the group consisting of glycol ether, glycol and triol, and dimethyl sulfoxide with water and performing distillation.
    Type: Application
    Filed: July 31, 2018
    Publication date: April 30, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Kunio MAYAHARA, Koji TAMURA, Akinobu TAKEDA
  • Cis-configurational unsaturated ester, process for producing the same, and fragrance composition containing the same
    Patent number: 6159928
    Abstract: The present invention provides a cis-configurational unsaturated ester represented by the formula (1) ##STR1## (where R is a methyl group or a phenyl group, and n is 1 or 2) and also provides a fragrance composition containing the cis-configurational unsaturated ester in an effective amount. The cis-configurational unsaturated ester represented by the formula (1) can be produced byreacting a cyclic vinyl ether represented by the formula (2a) ##STR2## (where n is defined as above) with a Grignard reagent represented by the formula (3a)RMgX (3a)(where R is defined as above, and X is a chlorine atom, a bromine atom or an iodine atom)in the presence of a triarylphosphine and not more than 0.
    Type: Grant
    Filed: April 12, 1999
    Date of Patent: December 12, 2000
    Assignee: Kuraray Co., Ltd.
    Inventors: Kunio Mayahara, Toshiki Mori, Yoshin Tamai