Patents by Inventor Toshihisa Kitagawa
Toshihisa Kitagawa 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).
-
Patent number: 10669397Abstract: A polymeric piezoelectric film, including a helical chiral polymer (A) having a weight average molecular weight of from 50,000 to 1,000,000 and optical activity, in which, in the film: a crystallinity given by a DSC method is from 20% to 80%; a standardized molecular orientation MORc is from 3.5 to 15.0 when a reference thickness measured by a microwave transmission-type molecular orientation meter is 50 ?m; and when a direction parallel to a phase difference streak is a direction X, a direction perpendicular to the direction X and parallel to a main plane of a film is a direction Y, and the phase difference streak is evaluated by an evaluation method A, per a length of 1,000 mm in the direction Y, a number of phase difference streaks with an evaluation value of 60 or more is 0, and a sum of the evaluation values of phase difference streaks with an evaluation value of 20 or more is 1000 or less.Type: GrantFiled: January 28, 2016Date of Patent: June 2, 2020Assignee: MITSUI CHEMICALS, INC.Inventors: Keisuke Sato, Katsuki Onishi, Hiroaki Tsushima, Kazuhiro Tanimoto, Toshihisa Kitagawa
-
Publication number: 20180022895Abstract: A polymeric piezoelectric film, including a helical chiral polymer (A) having a weight average molecular weight of from 50,000 to 1,000,000 and optical activity, in which, in the film: a crystallinity given by a DSC method is from 20% to 80%; a standardized molecular orientation MORc is from 3.5 to 15.0 when a reference thickness measured by a microwave transmission-type molecular orientation meter is 50 ?m; and when a direction parallel to a phase difference streak is a direction X, a direction perpendicular to the direction X and parallel to a main plane of a film is a direction Y, and the phase difference streak is evaluated by an evaluation method A, per a length of 1,000 mm in the direction Y, a number of phase difference streaks with an evaluation value of 60 or more is 0, and a sum of the evaluation values of phase difference streaks with an evaluation value of 20 or more is 1000 or less.Type: ApplicationFiled: January 28, 2016Publication date: January 25, 2018Applicant: MITSUI CHEMICALS, INC.Inventors: Keisuke SATO, Katsuki ONISHI, Hiroaki TSUSHIMA, Kazuhiro TANIMOTO, Toshihisa KITAGAWA
-
Publication number: 20170218117Abstract: Provided is a polymeric piezoelectric film containing an optically active helical chiral polymer (A) having a weight average molecular weight of from 50,000 to 1,000,000, in which a crystallinity obtained by a DSC method is from 20% to 80%, and the product of the crystallinity and a standardized molecular orientation MORc when a reference thickness measured by a microwave transmission-type molecular orientation meter is set to 50 ?m is from 25 to 700, and in which a surface roughness of at least one plane in terms of a non-contact three-dimensional surface roughness Sa measured by a confocal laser microscope is from 0.040 ?m to 0.105 ?m.Type: ApplicationFiled: July 10, 2015Publication date: August 3, 2017Applicant: MITSUI CHEMICALS, INC.Inventors: Kazuhiro TANIMOTO, Keisuke SATO, Toshihisa KITAGAWA, Katsutoshi OZAKI
-
Publication number: 20090133922Abstract: A light transmitting conductive film formed by patterning a conductive metal part and a visible light transmitting part on a transparent support, wherein the conductive metal part is made up of mesh-forming thin lines of from 1 ?m to 40 ?m size and the mesh pattern continues for 3 m or longer. A method of producing a display filter wherein the end sections of at least two sides facing each other are in a mesh shape, which comprises using an electromagnetic wave shielding material (C), wherein a conductive layer (B) having the conductive parts being in the mesh shape of the geometric pattern is formed on one face of a polymer film (A) continuously in the machine direction of the polymer film (A), and cutting the mesh-like parts.Type: ApplicationFiled: February 15, 2006Publication date: May 28, 2009Applicants: FUJIFILM Corporation, MITSUI CHEMICALS, INC.Inventors: Kentaro Okazaki, Akimitsu Morimoto, Tomoyuki Okamura, Toshihisa Kitagawa, Makoto Morohashi, Tomoaki Ito, Hiromi Minami
-
Publication number: 20070071970Abstract: A laminate which can easily attain safety standards such as impact resistance, while cost reduction is aimed for, for example, when the laminate is provided on a display viewing surface, and a display apparatus using this laminate are provided. By using a filter for a display having a specified parameter and a specified thickness, the impact resistance is enhanced. By using the filter for the display containing a transparent adhesive layer having a specified Young's modulus and a specified thickness, the impact resistance is enhanced. By using the filter for the display containing a transparent resin layer having a specified Young's modulus and a specified thickness, the impact resistance is enhanced. By using the filter for the display containing an impact absorption layer having a specified penetration and a specified thickness, the impact resistance is enhanced.Type: ApplicationFiled: November 29, 2006Publication date: March 29, 2007Applicant: MITSUI CHEMICAL, INC.Inventors: Katsuhiko Koike, Tetsunori Shinozaki, Tomoyuki Okamura, Toshihisa Kitagawa, Shin Fukuda, Hiroaki Saigou, Makoto Morohashi
-
Patent number: 7163739Abstract: A laminate is provided that can easily attain safety standards, such as impact resistance, while cost reduction is aimed for, for example, when the laminate is provided on a display viewing surface. A display apparatus using the laminate is also provided. By using a filter for a display having a specified parameter, for example, containing a transparent adhesive layer or a transparent resin layer having a specified Young's modulus and a specified thickness, impact resistance is enhanced. By using the filter for a display containing an impact absorption layer having a specified penetration and a specified thickness, impact resistance is enhanced.Type: GrantFiled: March 15, 2002Date of Patent: January 16, 2007Assignee: Mitsui Chemicals, Inc.Inventors: Katsuhiko Koike, Tetsunori Shinozaki, Tomoyuki Okamura, Toshihisa Kitagawa, Shin Fukuda, Hiroaki Saigou, Makoto Morohashi
-
Patent number: 6965191Abstract: The display filter is constituted by laminating a transparent adhesive layer (C) 31 containing dye, a polymer film (B) 20, a transparent electrically conductive layer (D) 10, a transparent adhesive layer (E) 40, and a functional transparent layer (A) 60 having an anti-reflection property, a hard coat property, a gas barrier property, an antistatic property and an anti-fouling property sequentially in this order, adhered on a display area 00; on this occasion, the transparent electrically conductive layer (D) 10 is grounded to a ground terminal of the display via an electrode 50 and an electrically conductive copper foil adhesive tape 80.Type: GrantFiled: February 1, 2001Date of Patent: November 15, 2005Assignee: Mitsui Chemicals, Inc.Inventors: Katsuhiko Koike, Tomoyuki Okamura, Toshihisa Kitagawa, Hiroaki Saigo, Shin Fukuda, Fumiharu Yamazaki, Taizo Nishimoto, Tsutami Misawa
-
Publication number: 20030176124Abstract: A laminate which can easily attain safety standards such as impact resistance, while cost reduction is aimed for, for example, when the laminate is provided on a display viewing surface, and a display apparatus using this laminate are provided. By using a filter for a display having a specified parameter and a specified thickness, the impact resistance is enhanced. By using the filter for the display containing a transparent adhesive layer having a specified Young's modulus and a specified thickness, the impact resistance is enhanced. By using the filter for the display containing a transparent resin layer having a specified Young's modulus and a specified thickness, the impact resistance is enhanced. By using the filter for the display containing an impact absorption layer having a specified penetration and a specified thickness, the impact resistance is enhanced.Type: ApplicationFiled: November 14, 2002Publication date: September 18, 2003Inventors: Katsuhiko Koike, Tetsunori Shinozaki, Tomoyuki Okamura, Toshihisa Kitagawa, Shin Fukuda, Hiroaki Saigou, Makoto Morohashi
-
Publication number: 20030156080Abstract: The display filter is constituted by laminating a transparent adhesive layer (C) 31 containing dye, a polymer film (B) 20, a transparent electrically conductive layer (D) 10, a transparent adhesive layer (E) 40, and a functional transparent layer (A) 60 having an anti-reflection property, a hard coat property, a gas barrier property, an antistatic property and an anti-fouling property sequentially in this order, adhered on a display area 00; on this occasion, the transparent electrically conductive layer (D) 10 is grounded to a ground terminal of the display via an electrode 50 and an electrically conductive copper foil adhesive tape 80.Type: ApplicationFiled: November 13, 2002Publication date: August 21, 2003Inventors: Katsuhiko Koike, Tomoyuki Okamura, Toshihisa Kitagawa, Hiroaki Saigo, Shin Fukuda, Fumiharu Yamazaki, Taizo Nishimoto, Tsutami Misawa