Patents by Inventor Toshio Ishidera

Toshio Ishidera 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).

  • Copolymerized aromatic polyester, biaxially oriented polyester film, and magnetic recording medium
    Patent number: 8431259
    Abstract: Disclosed are a biaxially oriented polyester film which is excellent in dimensional stability, especially dimensional stability against environmental changes in, for example, temperature and humidity, and a polyester capable of providing the biaxially oriented polyester film with excellent dimensional stability. There is provided a copolymerized aromatic polyester containing aromatic dicarboxylic acid components represented by the following formulae (I) and (II) and a glycol component represented by the following formula (III), wherein a 4,4?-(alkylenedioxy)bisbenzoic acid component represented by the formula (I) is contained in an amount of 5% by mole or more and less than 90% by mole on the basis of a molar number of an aromatic dicarboxylic acid component; and a film thereof.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: April 30, 2013
    Assignee: Teijin Limited
    Inventors: Yoshitaka Tanaka, Toshio Ishidera, Tatsuya Ogawa, Hiromichi Ito
  • COPOLYMERIZED AROMATIC POLYESTER, BIAXIALLY ORIENTED POLYESTER FILM, AND MAGNETIC RECORDING MEDIUM
    Publication number: 20110135965
    Abstract: Disclosed are a biaxially oriented polyester film which is excellent in dimensional stability, especially dimensional stability against environmental changes in, for example, temperature and humidity, and a polyester capable of providing the biaxially oriented polyester film with excellent dimensional stability. There is provided a copolymerized aromatic polyester containing aromatic dicarboxylic acid components represented by the following formulae (I) and (II) and a glycol component represented by the following formula (III), wherein a 4,4?-(alkylenedioxy)bisbenzoic acid component represented by the formula (I) is contained in an amount of 5% by mole or more and less than 90% by mole on the basis of a molar number of an aromatic dicarboxylic acid component; and a film thereof.
    Type: Application
    Filed: December 2, 2010
    Publication date: June 9, 2011
    Applicant: TEIJIN LIMITED
    Inventors: Yoshitaka Tanaka, Toshio Ishidera, Tatsuya Ogawa, Hiromichi Ito