Patents by Inventor Tetsuro NAKANISHI

Tetsuro NAKANISHI 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).

  • 1,3-BUTYLENE GLYCOL PRODUCT AND METHOD FOR PRODUCING 1,3-BUTYLENE GLYCOL
    Publication number: 20230098112
    Abstract: A high-purity 1,3-butylene glycol product is provided, which is colorless and odorless (or almost colorless and odorless), unlikely to cause coloration and odor over time, and, besides, unlikely to cause an acid concentration increase over time also in a state containing water. A 1,3-butylene glycol product in which at least one of a content of methyl vinyl ketone, a content of acetone, a content of butylaldehyde, a content of acetaldol, a content of a compound represented by Formula (1) below, a content of a compound represented by Formula (2) below, a content of a compound represented by Formula (3) below, and a total content of a compound represented by Formula (4) below and a compound represented by Formula (5) below, is less than 8 ppm.
    Type: Application
    Filed: December 23, 2020
    Publication date: March 30, 2023
    Applicant: DAICEL CORPORATION
    Inventors: Masahiko SHIMIZU, Yasuteru KAJIKAWA, Yuuichirou HIRAI, Keisuke ONO, Midori UMEHARA, Yuki TESHIMA, Tetsuro NAKANISHI
  • 1,3-BUTYLENE GLYCOL PRODUCT
    Publication number: 20220362118
    Abstract: Provided is a high-purity 1,3-butylene glycol product that is odorless and is unlikely to cause acid concentration increase over time in a state containing water. A 1,3-butylene glycol product, having, according to a gas chromatographic analysis performed under predetermined conditions, a peak area ratio of 100 ppm or lower appearing in a relative retention time ranging from 1.35 to 1.45, provided that the relative retention time for a peak of 1,3-butylene glycol is 1.0.
    Type: Application
    Filed: September 3, 2020
    Publication date: November 17, 2022
    Applicant: DAICEL CORPORATION
    Inventors: Yasuteru KAJIKAWA, Yuki TESHIMA, Yuuichirou HIRAI, Keisuke ONO, Midori UMEHARA, Tetsuro NAKANISHI
  • 1,3-BUTYLENE GLYCOL PRODUCT
    Publication number: 20220323322
    Abstract: Provided is a high-purity 1,3-butylene glycol product that is colorless and odorless, and furthermore, unlikely to be colored over time. A 1,3-butylene glycol product, having, according to a gas chromatographic analysis performed under predetermined conditions, a peak area ratio of 1000 ppm or lower appearing in a relative retention time ranging from 2.3 to 2.4, provided that the relative retention time for a peak of 1,3-butylene glycol is 1.0.
    Type: Application
    Filed: September 3, 2020
    Publication date: October 13, 2022
    Applicant: DAICEL CORPORATION
    Inventors: Yasuteru KAJIKAWA, Tetsuro NAKANISHI, Yuuichirou HIRAI, Keisuke ONO, Midori UMEHARA, Yuki TESHIMA
  • 1,3-BUTYLENE GLYCOL PRODUCT
    Publication number: 20220296481
    Abstract: Provided is a high-purity 1,3-butylene glycol product that is colorless and odorless, unlikely to be colored over time, and furthermore, unlikely to cause acid concentration increase over time in a state containing water. A 1,3-butylene glycol product, having, according to a gas chromatographic analysis performed under predetermined conditions, a peak ratio of 2000 ppm or lower appearing in a relative retention time ranging from 1.6 to 1.8, provided that the relative retention time for a peak of 1,3-butylene glycol is 1.0.
    Type: Application
    Filed: September 3, 2020
    Publication date: September 22, 2022
    Applicant: DAICEL CORPORATION
    Inventors: Yasuteru KAJIKAWA, Tetsuro NAKANISHI, Yuki TESHIMA, Yuuichirou HIRAI, Keisuke ONO, Midori UMEHARA