Patents by Inventor Keiko Ohtsuka

Keiko Ohtsuka 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).

  • RESIN COMPOSITION FOR GENERATING ALLYLPHENOL-MALEIMIDE COPOLYMER FOR ELECTRONIC COMPONENT PROTECTIVE FILM, AND ELECTRONIC COMPONENT PROTECTIVE FILM COMPRISING THIS COPOLYMER
    Publication number: 20210388227
    Abstract: This invention provides a resin composition for preparing an allylphenol-maleimide copolymer used for a protective film for an electronic component including: (A) an allyl group-containing phenol compound having a rigid structure; (B) an N-aromatic maleimide group-containing compound having a rigid structure; and (C) an N-aliphatic maleimide group-containing compound having a flexible structure.
    Type: Application
    Filed: November 5, 2019
    Publication date: December 16, 2021
    Inventors: Keiko OHTSUKA, Morio YONEKAWA, Hajime KIMURA, Ken YOSHIOKA, Nobuhiro KANAMARU, Masaki SUWA, Kazumi MACHIDA
  • Separator for fuel cell, method for producing the same, and fuel cell using the same
    Publication number: 20050142413
    Abstract: The present invention provides a fuel cell separator obtainable by hot-molding an electroconductive resin composition that comprises a thermosetting resin (A) which comprises a compound with a dihydrobenzoxazine ring (a), a compound (b) reactive with a phenolic hydroxyl group formed by opening of a dihydrobenzoxazine ring, and a latent curing agent (c), and an electroconductive material (B); a process for producing the separator; and a fuel cell comprising the separator.
    Type: Application
    Filed: March 10, 2003
    Publication date: June 30, 2005
    Applicants: SANSHO KAKOU CO., LTD., OSAKA MUNICIPAL GOVERNMENT
    Inventors: Hajime Kimura, Akihiro Matsumoto, Keiko Ohtsuka, Junzo Fukunaga