Patents by Inventor Masayoshi KASHIBE

Masayoshi KASHIBE 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).

  • MEDICAL RUBBER COMPOSITION, MEDICAL RUBBER PART, AND PRE-FILLABLE SYRINGE
    Publication number: 20230008859
    Abstract: A medical rubber composition can contain, comprise, consist, or consist essentially of: (a) an isobutylene-isoprene rubber: (b) a diene-based rubber; and a silica having a BET specific surface area not lower than 130 m2/g. An amount of (a) the isobutylene-isoprene rubber contained in 100 parts by mass of a rubber component composed of (a) the isobutylene-isoprene rubber and (b) the diene-based rubber can be larger than 30 parts by mass and smaller than 55 parts by mass.
    Type: Application
    Filed: July 8, 2022
    Publication date: January 12, 2023
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventors: Hirofumi KONISHI, Toshikazu KONDO, Masayoshi KASHIBE, Hideyuki SHIGEMOTO