Patents by Inventor Kunio Hatanaka

Kunio Hatanaka 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).

  • Polycarbonate resin film and manufacturing process thereof
    Patent number: 8298630
    Abstract: A polycarbonate resin film which has an average thickness of 10 to 150 ?m, a thickness nonuniformity of 2% or less, a retardation R(589) in the plane of the film measured at a wavelength of 589 nm of 12 nm or less, a retardation Rth(589) in the thickness direction of the film measured at a wavelength of 589 nm of 35 nm or less and is used for optical purposes.
    Type: Grant
    Filed: December 27, 2006
    Date of Patent: October 30, 2012
    Assignee: Teijin Chemicals, Ltd.
    Inventors: Hideaki Nitta, Masahiro Murakami, Kunio Hatanaka, Takatsune Yanagida, Hironobu Katoh, Kinji Hasegawa
  • Optical element and achromatic lens
    Patent number: 7700714
    Abstract: There are provided an optical element that comprises a polymer which has a structural unit derived from a specific dihydroxy compound typified by 2,2-bis(4-hydroxyphenyl)-1,1,1,3,3,3-hexafluoro propane (bisphenol AF) and in which the relationship between a refractive index nD and an Abbe number ?D satisfies the following formula (I): nD+0.0076×?D?1.78??(I) and that is used for correction of chromatic aberration, and an achromatic lens using the optical element.
    Type: Grant
    Filed: November 8, 2006
    Date of Patent: April 20, 2010
    Assignee: Teijin Chemicals, Ltd.
    Inventors: Kunio Hatanaka, Yoshihiko Imanaka, Masanori Monri
  • Polycarbonate Resin Film and Manufacturing Process Thereof
    Publication number: 20090186168
    Abstract: A polycarbonate resin film which has an average thickness of 10 to 150 ?m, a thickness nonuniformity of 2% or less, a retardation R(589) in the plane of the film measured at a wavelength of 589 nm of 12 nm or less, a retardation Rth(589) in the thickness direction of the film measured at a wavelength of 589 nm of 35 nm or less and is used for optical purposes.
    Type: Application
    Filed: December 27, 2006
    Publication date: July 23, 2009
    Applicant: TEIJIN CHEMICALS, LTD.
    Inventors: Hideaki Nitta, Masahiro Murakami, Kunio Hatanaka, Takatsune Yanagida, Hironobu Katoh, Kinji Hasegawa
  • Optical Element and Achromatic Lens
    Publication number: 20090143560
    Abstract: There are provided an optical element that comprises a polymer which has a structural unit derived from a specific dihydroxy compound typified by 2,2-bis(4-hydroxyphenyl)-1,1,1,3,3,3-hexafluoro propane (bisphenol AF) and in which the relationship between a refractive index nD and an Abbe number ?D satisfies the following formula (I): nD+0.0076×?D?1.78??(I) and that is used for correction of chromatic aberration, and an achromatic lens using the optical element.
    Type: Application
    Filed: November 8, 2006
    Publication date: June 4, 2009
    Inventors: Kunio Hatanaka, Yoshihiko Imanaka, Masanori Monri
  • Aromatic polycarbonate resin composition and process for the production thereof
    Publication number: 20070155888
    Abstract: This invention aims at providing an aromatic polycarbonate resin composition having high elasticity with a small content of an inorganic filler and a process for the production thereof, and provides a process for the production of a resin composition comprising 100 parts by weight of an aromatic polycarbonate (Component A) and 0.
    Type: Application
    Filed: February 23, 2005
    Publication date: July 5, 2007
    Inventors: Koichi Imamura, Masaki Mitsunaga, Kunio Hatanaka, Katsuhiko Hironaka