Patents by Inventor Ryuta SENO

Ryuta SENO 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).

  • Ethylene-vinyl alcohol copolymer pellets, and production method for ethylene-vinyl alcohol copolymer pellets containing conjugated polyene and alkali earth metal
    Patent number: 11015038
    Abstract: Ethylene-vinyl alcohol copolymer pellets comprise: an ethylene-vinyl alcohol copolymer; a conjugated polyene; and 1 to 200 ppm of an alkali earth metal based on the weight of the pellets; wherein pellet surface portions of the ethylene-vinyl alcohol copolymer pellets have a conjugated polyene content of not lower than 30 ppb based on the weight of the pellets. Such ethylene-vinyl alcohol copolymer pellets are capable of reliably suppressing occurrence of minute fisheyes each having a diameter of not greater than 200 ?m.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: May 25, 2021
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Ryuta Seno, Makoto Hatanaka
  • Ethylene-vinyl alcohol copolymer composition pellets, and production method for ethylene-vinyl alcohol copolymer composition pellets
    Patent number: 11015029
    Abstract: Ethylene-vinyl alcohol copolymer composition pellets comprise: an ethylene-vinyl alcohol copolymer, a conjugated polyene, and a predetermined amount of at least one fisheye-suppressing component; wherein pellet surface portions of the ethylene-vinyl alcohol copolymer composition pellets have a conjugated polyene content of not lower than 30 ppb based on the weight of the pellets. Such ethylene-vinyl alcohol copolymer composition pellets are capable of reliably suppressing occurrence of minute fisheyes having a diameter of 200 ?m or smaller.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: May 25, 2021
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Ryuta Seno, Makoto Hatanaka
  • Saponified ethylene-vinyl ester copolymer pellet and method for producing same
    Patent number: 10738184
    Abstract: Provided is an EVOH resin pellet which is capable of reducing the occurrence of fish eyes in a melt molded article of an EVOH resin. The occurrence of fish eyes in a melt molded article such as a film that is produced by melt molding using pellets is able to be suppressed by setting the abundance of a conjugated polyene in a surface portion of the pellet to an intended amount or more.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: August 11, 2020
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Ryuta Seno, Shinichi Hori, Nobuaki Sato
  • ETHYLENE-VINYL ALCOHOL COPOLYMER COMPOSITION PELLETS, AND PRODUCTION METHOD FOR ETHYLENE-VINYL ALCOHOL COPOLYMER COMPOSITION PELLETS
    Publication number: 20190322817
    Abstract: Ethylene-vinyl alcohol copolymer composition pellets comprise: an ethylene-vinyl alcohol copolymer, a conjugated polyene, and a predetermined amount of at least one fisheye-suppressing component; wherein pellet surface portions of the ethylene-vinyl alcohol copolymer composition pellets have a conjugated polyene content of not lower than 30 ppb based on the weight of the pellets. Such ethylene-vinyl alcohol copolymer composition pellets are capable of reliably suppressing occurrence of minute fisheyes having a diameter of 200 ?m or smaller.
    Type: Application
    Filed: June 25, 2019
    Publication date: October 24, 2019
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Ryuta SENO, Makoto HATANAKA
  • ETHYLENE-VINYL ALCOHOL COPOLYMER PELLETS, AND PRODUCTION METHOD FOR ETHYLENE-VINYL ALCOHOL COPOLYMER PELLETS CONTAINING CONJUGATED POLYENE AND ALKALI EARTH METAL
    Publication number: 20190315941
    Abstract: Ethylene-vinyl alcohol copolymer pellets comprise: an ethylene-vinyl alcohol copolymer; a conjugated polyene; and 1 to 200 ppm of an alkali earth metal based on the weight of the pellets; wherein pellet surface portions of the ethylene-vinyl alcohol copolymer pellets have a conjugated polyene content of not lower than 30 ppb based on the weight of the pellets. Such ethylene-vinyl alcohol copolymer pellets are capable of reliably suppressing occurrence of minute fisheyes each having a diameter of not greater than 200 ?m.
    Type: Application
    Filed: June 26, 2019
    Publication date: October 17, 2019
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Ryuta SENO, Makoto HATANAKA
  • SAPONIFIED ETHYLENE-VINYL ESTER COPOLYMER PELLET AND METHOD FOR PRODUCING SAME
    Publication number: 20180319965
    Abstract: Provided is an EVOH resin pellet which is capable of reducing the occurrence of fish eyes in a melt molded article of an EVOH resin. The occurrence of fish eyes in a melt molded article such as a film that is produced by melt molding using pellets is able to be suppressed by setting the abundance of a conjugated polyene in a surface portion of the pellet to an intended amount or more.
    Type: Application
    Filed: October 27, 2016
    Publication date: November 8, 2018
    Applicant: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Ryuta SENO, Shinichi HORI, Nobuaki SATO