Patents by Inventor Hitomi Murase

Hitomi Murase 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).

  • Polyimide film and methods relating thereto
    Publication number: 20090171063
    Abstract: A polyimide film with advantageous handleability, flexibility, dimensional stability and heat resistance is provided. The polyimide film is characterized by block-copolymerizing an aromatic diamine component comprising 10˜25 mol % of paraphenylenediamine (a1) and 75˜90 mol % of 4,4?-diaminodiphenyl ether (a2) with an aromatic tetracarboxylic acid component consisting of 75˜99.9 mol % of pyromellitic acid dianhydride (b1) and 0.1˜25 mol % of 3,3?,4,4?-biphenyl tetracarboxylic acid dianhydride (b2). The Young's modulus, linear expansion coefficient, water absorption rate and glass transition temperature of such polyimide films can be controlled within very useful ranges.
    Type: Application
    Filed: January 31, 2008
    Publication date: July 2, 2009
    Inventors: Tadashi Ishibashi, Hirokazu Yokoyama, Shinsuke Yamashita, Shotaro Hidaka, Hitomi Murase