Patents by Inventor Tomokazu Umemoto

Tomokazu Umemoto 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).

  • Patent number: 12133453
    Abstract: Provided are: a highly durable polymer having a high hole-injection/transport capacity; and a composition for an organic electroluminescent element, which contains the polymer.
    Type: Grant
    Filed: November 1, 2023
    Date of Patent: October 29, 2024
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Yanjun Li, Tomokazu Umemoto, Hideki Gorohmaru, Koichiro Iida, Kouji Adachi
  • Publication number: 20240107870
    Abstract: Provided are: a highly durable polymer having a high hole-injection/transport capacity; and a composition for an organic electroluminescent element, which contains the polymer.
    Type: Application
    Filed: November 1, 2023
    Publication date: March 28, 2024
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Yanjun LI, Tomokazu UMEMOTO, Hideki GOROHMARU, Koichiro IIDA, Kouji ADACHI
  • Patent number: 11943997
    Abstract: Provided are: a highly durable polymer having a high hole-injection/transport capacity; and a composition for an organic electroluminescent element, which contains the polymer.
    Type: Grant
    Filed: September 16, 2020
    Date of Patent: March 26, 2024
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Yanjun Li, Tomokazu Umemoto, Hideki Gorohmaru, Koichiro Iida, Kouji Adachi
  • Patent number: 11793069
    Abstract: The present invention provides with an electron-accepting compound having a structure of the following formula (1):
    Type: Grant
    Filed: March 14, 2022
    Date of Patent: October 17, 2023
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Hideki Gorohmaru, Kazuki Okabe, Koichiro Iida, Tomokazu Umemoto, Yoshimasa Bando, Koichi Ishibashi, Yoshiko Kajiyama, Tomohiro Abe
  • Publication number: 20220209125
    Abstract: The present invention provides with an electron-accepting compound having a structure of the following formula (1):
    Type: Application
    Filed: March 14, 2022
    Publication date: June 30, 2022
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Hideki GOROHMARU, Kazuki OKABE, Koichiro IIDA, Tomokazu UMEMOTO, Yoshimasa BANDO, Koichi ISHIBASHI, Yoshiko KAJIYAMA, Tomohiro ABE
  • Patent number: 11316112
    Abstract: The present invention provides with an electron-accepting compound having a structure of the following formula (1):
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: April 26, 2022
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Hideki Gorohmaru, Kazuki Okabe, Koichiro Iida, Tomokazu Umemoto, Yoshimasa Bando, Koichi Ishibashi, Yoshiko Kajiyama, Tomohiro Abe
  • Publication number: 20210005819
    Abstract: Provided are: a highly durable polymer having a high hole-injection/transport capacity; and a composition for an organic electroluminescent element, which contains the polymer.
    Type: Application
    Filed: September 16, 2020
    Publication date: January 7, 2021
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Yanjun LI, Tomokazu UMEMOTO, Hideki GOROHMARU, Koichiro IIDA, Kouji ADACHI
  • Patent number: 10270035
    Abstract: The object of the present invention is to provide a polymer capable of being insolubilized at a low temperature in a short time, having a high hole injecting and transporting ability and a high durability, and a composition for organic electroluminescent element comprising the polymer. The polymer of the present invention comprises a specific crosslinkable group.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: April 23, 2019
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Koichiro Iida, Yanjun Li, Tomokazu Umemoto, Qi Gao, Hideki Goromaru
  • Publication number: 20190019956
    Abstract: The present invention provides with an electron-accepting compound having a structure of the following formula (1):
    Type: Application
    Filed: September 20, 2018
    Publication date: January 17, 2019
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Hideki GOROHMARU, Kazuki Okabe, Koichiro Iida, Tomokazu Umemoto, Yoshimasa Bando, Koichi Ishibashi, Yoshiko Kajiyama, Tomohiro Abe
  • Publication number: 20160372676
    Abstract: The object of the present invention is to provide a polymer capable of being insolubilized at a low temperature in a short time, having a high hole injecting and transporting ability and a high durability, and a composition for organic electroluminescent element comprising the polymer. The polymer of the present invention comprises a specific crosslinkable group.
    Type: Application
    Filed: August 31, 2016
    Publication date: December 22, 2016
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Koichiro IIDA, Yanjun Li, Tomokazu Umemoto, Qi Gao, Hideki Goromaru
  • Patent number: 9309385
    Abstract: The present invention relates to cellulose fibers wherein a part of the hydroxyl groups of the cellulose have been substituted with at least one of a carboxy group and formyl group of 0.1 mmol/g or larger based on the weight of the cellulose fibers, and have been further substituted with a chemical modification group other than the carboxy and formyl groups.
    Type: Grant
    Filed: August 21, 2013
    Date of Patent: April 12, 2016
    Assignee: Oji Holdings Corporation
    Inventors: Tomokazu Umemoto, Naohide Ogita, Takanori Shimizu, Yasutomo Noishiki, Hiroyuki Nagatani, Go Banzashi
  • Publication number: 20140319502
    Abstract: An object of the present invention is to provide a coating composition capable of being easily formed by coating or the like, and a porous membrane and a light scattering layer which are excellent in heat resistance, surface smoothness and flexibility and have a high refractive index, a high light scattering property, and a high light transmittance, and further an organic electroluminescent element having the light scattering layer. It has been found that voids are formed inside a cured product obtained by curing a composition containing a polysilane, a metal oxide, and a solvent. The cured product having the voids formed therein has a light scattering property and therefore is applicable as a light scattering membrane.
    Type: Application
    Filed: July 10, 2014
    Publication date: October 30, 2014
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventor: Tomokazu UMEMOTO
  • Patent number: 8771463
    Abstract: An object of the present invention is to provide a cellulose fiber assembly and a cellulose fiber composite, each having low coloration. The present invention is directed to a method for preparing a fibrillated cellulose fiber assembly, in which the cellulose fiber raw materials are subjected to a fibrillation treatment and a reduction treatment. The present invention provides a method for preparing a cellulose fiber assembly, comprising a fibrillation step of fibrillating cellulose fiber raw materials to obtain fibrillated cellulose fibers, an assembly preparation step of obtaining a cellulose fiber assembly using the fibrillated cellulose fibers, and a step of carrying out a reduction treatment. Further, the present invention provides a cellulose fiber composite comprising the prepared cellulose fiber assembly and a matrix material.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: July 8, 2014
    Assignee: Oji Holdings Corporation
    Inventors: Tomokazu Umemoto, Hideko Akai, Yasutomo Noishiki, Go Banzashi
  • Publication number: 20130338250
    Abstract: The present invention relates to cellulose fibers wherein a part of the hydroxyl groups of the cellulose have been substituted with at least one of a carboxy group and formyl group of 0.1 mmol/g or larger based on the weight of the cellulose fibers, and have been further substituted with a chemical modification group other than the carboxy and formyl groups.
    Type: Application
    Filed: August 21, 2013
    Publication date: December 19, 2013
    Applicants: OJI HOLDINGS CORPORATION, MITSUBISHI CHEMICAL CORPORATION
    Inventors: Tomokazu UMEMOTO, Naohide Ogita, Takanori Shimizu, Yasutomo Noishiki, Hiroyuki Nagatani, Go Banzashi
  • Publication number: 20130284387
    Abstract: An object of the present invention is to provide a cellulose fiber assembly and a cellulose fiber composite, each having low coloration. The present invention is directed to a method for preparing a fibrillated cellulose fiber assembly, in which the cellulose fiber raw materials are subjected to a fibrillation treatment and a reduction treatment. The present invention provides a method for preparing a cellulose fiber assembly, comprising a fibrillation step of fibrillating cellulose fiber raw materials to obtain fibrillated cellulose fibers, an assembly preparation step of obtaining a cellulose fiber assembly using the fibrillated cellulose fibers, and a step of carrying out a reduction treatment. Further, the present invention provides a cellulose fiber composite comprising the prepared cellulose fiber assembly and a matrix material.
    Type: Application
    Filed: November 15, 2011
    Publication date: October 31, 2013
    Applicant: OJI HOLDINGS CORPORATION
    Inventors: Tomokazu Umemoto, Hideko Akai, Yasutomo Noishiki, Go Banzashi
  • Publication number: 20070178318
    Abstract: There is provided a coating composition capable of improving performance of coated films, such as dirt shedding property and weathering resistance, only by applying directly onto the surface of various structures such as building structures and civil engineering structures or on a previous coating film without requiring formation of any undercoat. A silicon-containing liquid composition having a water concentration of 50% by weight or more and a light transmittance of 70% or more, wherein the silicon-containing liquid composition is a composition capable of forming a film on a substrate having a water contact angle of 60° or more.
    Type: Application
    Filed: February 25, 2005
    Publication date: August 2, 2007
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Seiichiro Tanaka, Tomokazu Umemoto, Hiroshi Kobayashi, Takeshi Sawai