Patents by Inventor Toshiyuki Maki

Toshiyuki Maki 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).

  • Fixed-bed multi-tubular reactor for producing alkenyl acetate
    Patent number: 11607656
    Abstract: A fixed-bed multi-tubular reactor for producing an alkenyl acetate by a gas phase catalytic oxidation reaction of a lower olefin, acetic acid and oxygen including a plurality of reaction tubes, a thermometer protection tube inserted into at least one of the plurality of reaction tubes, a thermometer inserted into the thermometer protection tube, and a shield disposed above the reaction tube into which the thermometer protection tube is inserted and attached to the thermometer protection tube, wherein an effective projection region of the shield entirely covers the inlet opening of the reaction tube into which the thermometer protection tube is inserted.
    Type: Grant
    Filed: October 28, 2020
    Date of Patent: March 21, 2023
    Assignee: SHOWA DENKO K.K.
    Inventors: Yasuhiro Iwama, Maiko Ikushima, Kazuki Umehara, Mitsuru Tanaka, Toshiyuki Maki
  • FIXED-BED MULTI-TUBULAR REACTOR FOR PRODUCING ALKENYL ACETATE
    Publication number: 20220314181
    Abstract: A fixed-bed multi-tubular reactor for producing an alkenyl acetate by a gas phase catalytic oxidation reaction of a lower olefin, acetic acid and oxygen including a plurality of reaction tubes, a thermometer protection tube inserted into at least one of the plurality of reaction tubes, a thermometer inserted into the thermometer protection tube, and a shield disposed above the reaction tube into which the thermometer protection tube is inserted and attached to the thermometer protection tube, wherein an effective projection region of the shield entirely covers the inlet opening of the reaction tube into which the thermometer protection tube is inserted.
    Type: Application
    Filed: October 28, 2020
    Publication date: October 6, 2022
    Applicant: SHOWA DENKO K.K.
    Inventors: Yasuhiro IWAMA, Maiko IKUSHIMA, Kazuki UMEHARA, Mitsuru TANAKA, Toshiyuki MAKI
  • High speed file access control method and computer system including a plurality of storage subsystems connected on a bus
    Patent number: 5603003
    Abstract: In a computer system having an interface with an I/O bus given disconnect/reconnect functions and a plurality of magnetic disk subsystems connected with the I/O bus, control divides a file at a disk access time with reference to disk management information, file management information and file descriptor translation information to read/write a plurality of such files asynchronously. Thus, high speed file access can be realized by only the plurality of magnetic disk subsystems without requiring any special control hardware. A corresponding relation between subfiles in a virtual directory and the application request file can be taken to construct the directory, thus making the divided storage transparent to the application.
    Type: Grant
    Filed: March 1, 1993
    Date of Patent: February 11, 1997
    Assignees: Hitachi, Ltd., Hitachi Computer Engineering Co., Ltd.
    Inventors: Mitsuru Akizawa, Kanji Kato, Hiroyoshi Suzuki, Toshiyuki Maki, Hirofumi Yamashita, Akira Kito, Hidenori Yamada