Patents by Inventor Tatsuo Ishikawa

Tatsuo Ishikawa 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).

  • Publication number: 20190359825
    Abstract: An object of the present invention is to provide a curable composition which has excellent patterning properties and makes it possible to obtain a cured film having excellent light blocking properties. Another object of the present invention is to provide a cured film, a light blocking film, a solid-state imaging element, and a solid-state imaging device. The curable composition contains inorganic particles, a polymerizable compound, and a polymerization initiator, in which the inorganic particles contain metal carbide-containing particles containing a carbide of an element in group 5 of the periodic table, and a content of the metal carbide-containing particles in a total mass of the inorganic particles is equal to or greater than 55% by mass.
    Type: Application
    Filed: August 6, 2019
    Publication date: November 28, 2019
    Applicant: FUJIFILM Corporation
    Inventors: Tatsuo ISHIKAWA, Yoshinori Taguchi
  • Publication number: 20190185656
    Abstract: A curable composition contains a resin containing a curable group, a colorant, a polymerization inhibitor, and a polymerization initiator. A manufacturing method of the curable composition includes a colorant dispersing step of mixing together the resin containing a curable group, the colorant, and the polymerization inhibitor and a mixing step of mixing together the colorant dispersion and the polymerization initiator so as to obtain the curable composition. A cured film is obtained by curing the curable composition. A color filter, a solid-state imaging element, and an infrared sensor have the cured film. A manufacturing method of the cured film includes a curable composition layer-forming step, an exposure step, and a development step.
    Type: Application
    Filed: February 22, 2019
    Publication date: June 20, 2019
    Applicant: FUJIFILM Corporation
    Inventors: Michihiro Ogawa, Yutaro Fukami, Junichi Ito, Yushi Kaneko, Hiroaki Idei, Daisuke Hamada, Tatsuo Ishikawa
  • Patent number: 8460806
    Abstract: A magnetic tape cartridge including a reel and a pack of magnetic tape wound onto the reel, the magnetic tape includes an aromatic polyamide support and has a thickness of from 3.5 to 5.5 ?m and a length of 1000 m or more, and a difference in tape thickness produced between an outer and an inner winding of the tape pack after 2-week storage of the cartridge in a dry environment at 60° C. is 60 nm or smaller.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: June 11, 2013
    Assignee: FUJIFILM Corporation
    Inventors: Tatsuo Ishikawa, Norihito Kasada
  • Publication number: 20100247968
    Abstract: A magnetic tape cartridge including a reel and a pack of magnetic tape wound onto the reel, the magnetic tape includes an aromatic polyamide support and has a thickness of from 3.5 to 5.5 ?m and a length of 1000 m or more, and a difference in tape thickness produced between an outer and an inner winding of the tape pack after 2-week storage of the cartridge in a dry environment at 60° C. is 60 nm or smaller.
    Type: Application
    Filed: February 5, 2010
    Publication date: September 30, 2010
    Applicant: FUJIFILM CORPORATION
    Inventors: Tatsuo ISHIKAWA, Norihito KASADA
  • Patent number: 7381485
    Abstract: A magnetic recording tape comprising a nonmagnetic support and a magnetic layer containing ferromagnetic powder and a binder, wherein the nonmagnetic support has an intrinsic viscosity of from 0.40 to 0.60 dl/g and a number average molecular weight of from 12,000 to 24,000, and a distance between an apex of a maximum convexity and a valley of a maximum concavity of the nonmagnetic support on a cross section of an edge of the tape made by cutting the tape in a transverse direction is 2 ?m or less in the transverse direction.
    Type: Grant
    Filed: February 4, 2005
    Date of Patent: June 3, 2008
    Assignee: FUJIFILM Corporation
    Inventors: Tatsuo Ishikawa, Mikio Ohno, Tomohiro Ichikawa
  • Patent number: 7368189
    Abstract: A magnetic recording medium comprising: a magnetic layer containing ferromagnetic powder and a binder; a nonmagnetic support; and a back coat layer, in this order, wherein the nonmagnetic support contains polyester having an intrinsic viscosity of from 0.40 to 0.60 dl/g and a number average molecular weight of from 12,000 to 24,000, a surface of the magnetic layer on a side not having the nonmagnetic support has a surface roughness Ra of from 1 to 5 nm, and a surface of the back coat layer on a side not having the nonmagnetic support has a surface roughness Ra of from 6 to 20 nm.
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: May 6, 2008
    Assignee: FUJIFILM Corporation
    Inventors: Mikio Ohno, Tatsuo Ishikawa, Tomohiro Ichikawa
  • Patent number: 7349182
    Abstract: A magnetic recording medium for being used in a write/read system in which a difference of track width between write track width and read track width is smaller than 10 ?m, which comprises: a magnetic layer containing ferromagnetic powder and a binder; a nonmagnetic support; and a backcoating layer, in this order, at least one of the magnetic layer and the backcoating layer having servo signals for tracking control pre-recorded therein, wherein the nonmagnetic support is a film of a polyester having an intrinsic viscosity of 0.40 to 0.60 dl/g and a number average molecular weight of 12000 to 24000.
    Type: Grant
    Filed: February 4, 2005
    Date of Patent: March 25, 2008
    Assignee: FUJIFILM Corporation
    Inventors: Mikio Ohno, Tomohiro Ichikawa, Tatsuo Ishikawa
  • Patent number: 7045227
    Abstract: A magnetic recording medium comprising: a nonmagnetic support; an undercoat layer containing a compound polymerizable by radiation exposure; and a magnetic layer containing ferromagnetic powder and a binder, in this order wherein the undercoat layer has a thickness of from 0.1 to 1 ?m, the binder contains a polyurethane resin having a glass transition temperature of from 100 to 200° C., the magnetic layer has a thickness of from 20 to 150 nm, and an average particle size of the ferromagnetic powder is from 20 to 60 nm.
    Type: Grant
    Filed: March 19, 2004
    Date of Patent: May 16, 2006
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Tatsuo Ishikawa, Mikio Ohno
  • Patent number: 6991862
    Abstract: In one aspect, the magnetic recording medium comprises a magnetic layer comprising a ferromagnetic powder and a binder and said binder comprises polyurethane resin having a glass transition temperature of 100 to 200° C. In a second aspect, the magnetic recording medium comprises a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic powder and a binder in this order on a nonmagnetic support and at least the binder comprised in said magnetic layer comprises polyurethane resin having a glass transition temperature of 100 to 200° C. In both aspects, said magnetic layer has a thickness equal to or less than 0.15 ?m, said ferromagnetic powder has a mean major axis length or a mean plate diameter of 60 nm or less, and said magnetic layer has a coercivity of 159 to 239 kA/m in a longitudinal or in-plane direction.
    Type: Grant
    Filed: March 29, 2004
    Date of Patent: January 31, 2006
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Mikio Ohno, Tatsuo Ishikawa
  • Publication number: 20050202289
    Abstract: A magnetic recording tape comprising a nonmagnetic support and a magnetic layer containing ferromagnetic powder and a binder, wherein the nonmagnetic support has an intrinsic viscosity of from 0.40 to 0.60 dl/g and a number average molecular weight of from 12,000 to 24,000, and a distance between an apex of a maximum convexity and a valley of a maximum concavity of the nonmagnetic support on a cross section of an edge of the tape made by cutting the tape in a transverse direction is 2 ?m or less in the transverse direction.
    Type: Application
    Filed: February 4, 2005
    Publication date: September 15, 2005
    Inventors: Tatsuo Ishikawa, Mikio Ohno, Tomohiro Ichikawa
  • Publication number: 20050175866
    Abstract: A magnetic recording medium for being used in a write/read system in which a difference of track width between write track width and read track width is smaller than 10 ?m, which comprises: a magnetic layer containing ferromagnetic powder and a binder; a nonmagnetic support; and a backcoating layer, in this order, at least one of the magnetic layer and the backcoating layer having servo signals for tracking control pre-recorded therein, wherein the nonmagnetic support is a film of a polyester having an intrinsic viscosity of 0.40 to 0.60 dl/g and a number average molecular weight of 12000 to 24000.
    Type: Application
    Filed: February 4, 2005
    Publication date: August 11, 2005
    Inventors: Mikio Ohno, Tomohiro Ichikawa, Tatsuo Ishikawa
  • Publication number: 20050170213
    Abstract: A magnetic recording medium comprising: a magnetic layer containing ferromagnetic powder and a binder; a nonmagnetic support; and a back coat layer, in this order, wherein the nonmagnetic support contains polyester having an intrinsic viscosity of from 0.40 to 0.60 dl/g and a number average molecular weight of from 12,000 to 24,000, a surface of the magnetic layer on a side not having the nonmagnetic support has a surface roughness Ra of from 1 to 5 nm, and a surface of the back coat layer on a side not having the nonmagnetic support has a surface roughness Ra of from 6 to 20 nm.
    Type: Application
    Filed: January 26, 2005
    Publication date: August 4, 2005
    Inventors: Mikio Ohno, Tatsuo Ishikawa, Tomohiro Ichikawa
  • Publication number: 20040219393
    Abstract: In one aspect, the magnetic recording medium comprises a magnetic layer comprising a ferromagnetic powder and a binder and said binder comprises polyurethane resin having a glass transition temperature of 100 to 200° C. In a second aspect, the magnetic recording medium comprises a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic powder and a binder in this order on a nonmagnetic support and at least the binder comprised in said magnetic layer comprises polyurethane resin having a glass transition temperature of 100 to 200° C. In both aspects, said magnetic layer has a thickness equal to or less than 0.15 &mgr;m, said ferromagnetic powder has a mean major axis length or a mean plate diameter of 60 nm or less, and said magnetic layer has a coercivity of 159 to 239 kA/m in a longitudinal or in-plane direction.
    Type: Application
    Filed: March 29, 2004
    Publication date: November 4, 2004
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventors: Mikio Ohno, Tatsuo Ishikawa
  • Publication number: 20040191528
    Abstract: A magnetic recording medium comprising: a nonmagnetic support; an undercoat layer containing a compound polymerizable by radiation exposure; and a magnetic layer containing ferromagnetic powder and a binder, in this order wherein the undercoat layer has a thickness of from 0.1 to 1 &mgr;m, the binder contains a polyurethane resin having a glass transition temperature of from 100 to 200° C., the magnetic layer has a thickness of from 20 to 150 nm, and an average particle size of the ferromagnetic powder is from 20 to 60 nm.
    Type: Application
    Filed: March 19, 2004
    Publication date: September 30, 2004
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventors: Tatsuo Ishikawa, Mikio Ohno
  • Publication number: 20040123445
    Abstract: Disclosed is a method of producing a polygonal, ring-shaped machine part having a complex cross-section starting from a metal rod with improved productivity and remarkably increased material yield. The method comprises the steps of: forging a rod to prepare a notched blank 1 having large diameter parts 11 and the remaining small diameter parts 12; bending the large diameter parts 11 to form a first intermediate 3 of polygonal, open ring-shape and a complex cross-section with confronting ends; butting and welding the confronting ends of the first intermediate 3 to form a second intermediate 5; die-forging the second intermediate 5 to form a ring-shaped product 7; and subjecting the product 7 to necessary finishing step such as machining to obtain the final product.
    Type: Application
    Filed: December 16, 2003
    Publication date: July 1, 2004
    Inventors: Jun-Ichi Esaki, Tatsuo Ishikawa
  • Patent number: 6382448
    Abstract: A housing case for apparatus, which has both a display window and opaque ornamental layer on the surface of housing case, includes a transparent synthetic resin sheet. The synthetic resin sheet is provided with opaque printing layer in a pattern having unprinted portion corresponding to the display window. The synthetic resin sheet is formed into a shape of housing case. A formed product of transparent synthetic resin is insert-formed on the backside of the formed synthetic resin sheet. In the housing case, the forming of a ornamental pattern on the surface of housing case and a dispaly window can be made at the same time when forming a body of housing case(FIG. 1).
    Type: Grant
    Filed: June 23, 2000
    Date of Patent: May 7, 2002
    Assignee: Yoshida Kogyo Co., Ltd.
    Inventors: Yukitomo Yuhara, Takehisa Hibi, Tatsuo Ishikawa, Ichiro Kizawa
  • Patent number: 6346310
    Abstract: Disclosed is a magnetic recording medium comprising a magnetic layer on a surface of a flexible support and a backcoat layer on the opposite surface, characterized in that the backcoat layer comprises a granulated oxide consisting of titanium oxide, &agr;-iron oxide or a mixture thereof and carbon black in the weight ratio ranging from 60/40 to 90/10, and further comprises a binder in an amount ranging from 10 to 40 parts by weight with respect to 100 parts by weight of the total amount of the granulated oxide and carbon black. The magnetic recording medium of the present invention is characterized in that both the running durability and electromagnetic characteristics are excellent.
    Type: Grant
    Filed: December 19, 2000
    Date of Patent: February 12, 2002
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Koji Naoe, Tatsuo Ishikawa, Hiroaki Takano
  • Patent number: 6338896
    Abstract: The present invention provides a magnetic recording medium, which comprises a magnetic layer having ferromagnetic powder dispersed in a binder on a non-magnetic support member, wherein the non-magnetic support member is made of aromatic polyamide, an undercoating layer is provided between said non-magnetic support member and a lower non-magnetic layer, or between the non-magnetic support member and the magnetic layer, said undercoating layer comprising polyamide resin having tertiary amino group and containing repeated structural units expressed by the following formulae (1) and (2).
    Type: Grant
    Filed: March 29, 1999
    Date of Patent: January 15, 2002
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Katsuhiko Meguro, Tatsuo Ishikawa, Hiroshi Hashimoto
  • Patent number: 6129979
    Abstract: A magnetic recording medium composed of an aromatic polyamide support, a magnetic recording layer arranged on one surface side of the support, and a back-coating layer arranged on the other surface side of the support is improved in its running durability, by forming the back-coating layer from solid particles and a binder in amounts of the range of 8/10 to 20/10, and further by placing a subbing layer of polyester resin or polyurethane resin having a Tg of 40.degree. C.-80.degree. C. and a polar group such as --SO.sub.3 M, --OSO.sub.3 M, --COOM and --OPO.sub.3 MM.sup.1 (each of M and M.sup.1 is hydrogen, an alkaline metal ion or an ammonium ion) between the support and the back-coating layer.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: October 10, 2000
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toshio Kawamata, Tatsuo Ishikawa
  • Patent number: 5958565
    Abstract: A magnetic recording tape favorably employable for computer data storage has a flexible polymer web, a magnetic recording layer arranged on one surface side of the web, and a backing layer arranged on another surface side of the web, characterized in that the recording tape has a thickness of 2 to 8 .mu.m and shows a Young's modulus of not less than 1,200 kg/mm.sup.2 in its longitudinal direction; and the backing layer has a thickness of 0.2 to 1 .mu.m and is composed of a binder, a carbon black, a non-magnetic powder I having Mohs' scale of hardness of 3 to 4.5 and another non-magnetic powder II having Mohs' scale of hardness of 5 to 9. Between the magnetic layer and the flexible polymer web, a non-magnetic undercoating layer composed of a binder and a non-magnetic powder can be provided.
    Type: Grant
    Filed: April 28, 1997
    Date of Patent: September 28, 1999
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasushi Hattori, Akira Kasuga, Toshio Kawamata, Tatsuo Ishikawa, Satoru Hayakawa