Patents by Inventor Takaharu Isaki

Takaharu Isaki 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).

  • Piezoelectric polymer material, process for producing same, and piezoelectric element
    Patent number: 8648151
    Abstract: The invention provides a piezoelectric polymer material including a helical chiral polymer having a weight average molecular weight of from 50,000 to 1,000,000 and having optical activity, the piezoelectric polymer material having a piezoelectric constant d14 at 25° C. of 10 pC/N or more, a degree of crystallinity obtained by X-ray diffraction of from 40% to 80%, and a haze of from 0.5 to 30.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: February 11, 2014
    Assignees: Mitsui Chemicals, Inc., A School Corporation Kansai University
    Inventors: Mitsunobu Yoshida, Masanobu Ajioka, Kenichi Goto, Ichiro Fujio, Takaharu Isaki, Takayuki Onogi, Yoshiro Tajitsu, Shinichi Usugi, Takeshi Karino, Yoshiaki Aso
  • PIEZOELECTRIC POLYMER MATERIAL, PROCESS FOR PRODUCING SAME, AND PIEZOELECTRIC ELEMENT
    Publication number: 20120025674
    Abstract: The invention provides a piezoelectric polymer material including a helical chiral polymer having a weight average molecular weight of from 50,000 to 1,000,000 and having optical activity, the piezoelectric polymer material having a piezoelectric constant d14 at 25° C. of 10 pC/N or more, a degree of crystallinity obtained by X-ray diffraction of from 40% to 80%, and a haze of from 0.5 to 30.
    Type: Application
    Filed: March 15, 2010
    Publication date: February 2, 2012
    Applicants: A school Corporation Kansai University, Mitsui Chemicals, Inc.
    Inventors: Mitsunobu Yoshida, Masanobu Ajioka, Kenichi Goto, Ichiro Fujio, Takaharu Isaki, Takayuki Onogi, Yoshiro Tajitsu, Shinichi Usugi, Takeshi Karino, Yoshiaki Aso