Patents by Inventor Yuko Hoshi

Yuko Hoshi 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).

  • AROMATIC POLYETHER, METHOD FOR PRODUCING AROMATIC POLYETHER, COMPOSITION AND SHEET
    Publication number: 20250230278
    Abstract: An aromatic polyether containing a structural unit represented by the following formula (1), a structural unit represented by the following formula (2), and a structure represented by the following formula (3), wherein 1H-NMR measurement, a ratio of a peak intensity of a peak having the largest peak intensity among peaks derived from the structure represented by the formula (3) appearing in the range of chemical shift 7.55 ppm to 7.65 ppm, relative to a peak intensity of a peak derived from the structural unit represented by the formula (2) appearing in the vicinity of chemical shift 7.35 ppm is 0.20 to 2.00%.
    Type: Application
    Filed: February 24, 2023
    Publication date: July 17, 2025
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Koichi SUGA, Minoru SENGA, Hajime WATANABE, Yuko HOSHI, Hiromu KUMAGAI
  • POLYETHERETHERKETONE AND METHOD FOR PRODUCING THE SAME
    Publication number: 20240158574
    Abstract: A polyetheretherkenote comprising a repeating unit represented by the following formula (1) and a terminal structure represented by the following formula (2):
    Type: Application
    Filed: April 27, 2022
    Publication date: May 16, 2024
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Soshi NAMIKI, Takehiro FUJITA, Hiromu KUMAGAI, Yuko HOSHI
  • Platinum compound and process of preparing same
    Patent number: 5290961
    Abstract: Disclosed herein are a platinum compound employed as raw material of medicines having carcinostatic effects, and a process of preparing the platinum compound. The platinum compound (I) substantially free from impurities can be prepared through a reaction between the corresponding dihalogen compound and an organic dibasic acid employing an iodine compound utilizing the difference of solubilities between the desired compound and the iodine compounds.
    Type: Grant
    Filed: January 12, 1993
    Date of Patent: March 1, 1994
    Assignee: Tanaka Kikinzoku Kogyo K.K.
    Inventors: Koji Okamoto, Yuko Hoshi, Chihiro Nakanishi