Patents by Inventor Tomoko YANAGITA

Tomoko YANAGITA 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).

  • Method for producing pyromellitic dianhydride, pyromellitic dianhydride produced by the method, and apparatus therefor
    Patent number: 9856269
    Abstract: A method for producing a highly pure PMDA comprises at least the following steps: (1) a step of preparing a raw material solution by dissolving a raw material of a pyromellitic dianhydride in an acetic acid solvent, (2) a step of preparing a precursor pyromellitic dianhydride by recrystallizing the pyromellitic dianhydride in the prepared raw material solution and separating the acetic acid solvent, (3) a step of performing a degassing treatment on the precursor pyromellitic dianhydride by stirring the precursor pyromellitic dianhydride in a fluidized state while heating under reduced-pressure conditions, and (4) a step of taking out the pyromellitic dianhydride subjected to the degassing treatment.
    Type: Grant
    Filed: September 1, 2014
    Date of Patent: January 2, 2018
    Assignee: L'Air Liquide, SociétéAnonyme pour l'Etude et l'Exploitation des Procédés Georges Claude
    Inventors: Kohei Tarutani, Takashi Kameoka, Tomoko Yanagita, Ryohei Matsui
  • Film formation method and film formation apparatus
    Patent number: 9786494
    Abstract: Disclosed is a film formation method, including vaporizing a plurality of raw material monomers in respective corresponding vaporizers, supplying the plurality of raw material monomers into a film formation apparatus, causing vapor deposition polymerization of the plurality of raw material monomers in the film formation apparatus to form an organic film on a substrate, and removing an impurity contained in at least one raw material monomer among the plurality of raw material monomers before the vapor deposition polymerization.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: October 10, 2017
    Assignees: TOKYO ELECTRON LIMITED, L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE
    Inventors: Yasunori Kumagai, Kohei Tarutani, Takashi Kameoka, Tomoko Yanagita, Ryohei Matsui
  • METHOD FOR PRODUCING PYROMELLITIC DIANHYDRIDE, PYROMELLITIC DIANHYDRIDE PRODUCED BY THE METHOD, AND APPARATUS THEREFOR
    Publication number: 20160214991
    Abstract: A method for producing a highly pure PMDA comprises at least the following steps: (1) a step of preparing a raw material solution by dissolving a raw material of a pyromellitic dianhydride in an acetic acid solvent, (2) a step of preparing a precursor pyromellitic dianhydride by recrystallizing the pyromellitic dianhydride in the prepared raw material solution and separating the acetic acid solvent, (3) a step of performing a degassing treatment on the precursor pyromellitic dianhydride by stirring the precursor pyromellitic dianhydride in a fluidized state while heating under reduced-pressure conditions, and (4) a step of taking out the pyromellitic dianhydride subjected to the degassing treatment.
    Type: Application
    Filed: September 1, 2014
    Publication date: July 28, 2016
    Applicant: L'AIR LIQUIDE, SOCIÉTÉ ANONYME POUR I'ETUDE ET I'EXPLOITATION DES PROCÉDÉS GEORGES CLAUDE
    Inventors: Kohei TARUTANI, Takashi KAMEOKA, Tomoko YANAGITA, Ryohei MATSUI
  • FILM FORMATION METHOD AND FILM FORMATION APPARATUS
    Publication number: 20150064931
    Abstract: Disclosed is a film formation method, including vaporizing a plurality of raw material monomers in respective corresponding vaporizers, supplying the plurality of raw material monomers into a film formation apparatus, causing vapor deposition polymerization of the plurality of raw material monomers in the film formation apparatus to form an organic film on a substrate, and removing an impurity contained in at least one raw material monomer among the plurality of raw material monomers before the vapor deposition polymerization.
    Type: Application
    Filed: August 20, 2014
    Publication date: March 5, 2015
    Inventors: Yasunori KUMAGAI, Kohei TARUTANI, Takashi KAMEOKA, Tomoko YANAGITA, Ryohei MATSUI