Patents by Inventor Keisuke OSAMURA

Keisuke OSAMURA 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).

  • Carbon black and method for producing carbon black
    Patent number: 11981790
    Abstract: A carbon black wherein a nitrogen adsorption specific surface area (N2SA) is 25 to 60 m2/g, a DBP absorption number is 90 to 180 cm3/100 g, a ratio of the nitrogen adsorption specific surface area (N2SA) to an iodine adsorption number (IA) (N2SA/IA) is 1.10×103 to 1.50×103 m2/g, a hydrogen content by NMR is 150 to 250 /g, and ?D is 260 to 290 cm?1.
    Type: Grant
    Filed: August 13, 2021
    Date of Patent: May 14, 2024
    Assignee: Tokai Carbon Co. Ltd.
    Inventors: Akihiro Sakakibara, Yuki Kubota, Keisuke Osamura
  • CARBON BLACK AND METHOD FOR PRODUCING CARBON BLACK
    Publication number: 20230323073
    Abstract: A carbon black wherein a nitrogen adsorption specific surface area (N2SA) is 25 to 60 m2/g, a DBP absorption number is 90 to 180 cm3/100 g, a ratio of the nitrogen adsorption specific surface area (N2SA) to an iodine adsorption number (IA) (N2SA/IA) is 1.10×103 to 1.50×103 m2/g, a hydrogen content by NMR is 150 to 250 /g, and ?D is 260 to 290 cm?1.
    Type: Application
    Filed: August 13, 2021
    Publication date: October 12, 2023
    Applicant: TOKAI CARBON CO., LTD.
    Inventors: Akihiro SAKAKIBARA, Yuki KUBOTA, Keisuke OSAMURA