Patents by Inventor Kenichiro Okaniwa

Kenichiro Okaniwa 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: 6455209
    Abstract: A method of manufacturing a color filter having a substrate comprising black matrix sections and image forming sections, comprises a step of applying a treatment onto the substrate so as to provide influence to a contact angle between an ink meniscus and the black matrix sections before applying an ink onto the substrate.
    Type: Grant
    Filed: August 28, 2000
    Date of Patent: September 24, 2002
    Assignee: Konica Corporation
    Inventors: Kenichiro Okaniwa, Shozo Kikukawa, Takeshi Murakami, Masaharu Nonaka
  • Patent number: 5087421
    Abstract: Disclosed is a multilayered assay element in which the influence by the bilirubin contained in the sample fluid is substantially eliminated. The assay element of the present invention contains a bilirubin-trapping agent of the formula(A).sub.x (B).sub.y (C).sub.z [I](wherein A represents a monomer unit having a copolymerizable unsaturated double bond and a quaternary ammonium salt, B represents a monomer unit having a copolymerizable unsaturated double bond, C represents a monomer unit having at least two copolymerizable unsaturated double bonds and x, y and z represents the number mol % of 100-10, 90-0 and 10-0, respectively) which bilirubin-trapping agent is incorporated in a region which is upper than the reagent layer.
    Type: Grant
    Filed: May 19, 1989
    Date of Patent: February 11, 1992
    Assignee: Konica Corporation
    Inventors: Mikio Koyama, Satoshi Kawakatsu, Tomoji Akashi, Kenichiro Okaniwa
  • Patent number: 5059526
    Abstract: A stable dry multi-layer analytical element for enzyme or triglyceride analysis in a fluid sample is prepared containing first and second layers on a support. The first layer contains a tetrazolium salt as a dye forming precursor. The second layer is adjacent the first layer and contains an electron-transmitting agent. Either layer contains a co-enzyme in oxidized form and either layer contains a reagent containing an enzyme substrate, enzyme or co-enzyme other than the oxidized co-enzyme. The analytical element has improved storage stability and low fog density before and after storage.
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: October 22, 1991
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Kazumi Arai, Mario Kobayashi, Kenichiro Okaniwa
  • Patent number: 4914020
    Abstract: An analytical element to measure a specific component in a fluid samples comprising support, a layer containing a reagent provided the support and a spreading layer provided on above the reagent containing layer. In the spreading layer, an emzyme necessary for the reaction to produce a product capable of being detected with said reagent from the specific component is contained. The enzyme is protected from deterioration of activity during a manufacturing and preservation of the analytical element by means of the enzyme is included in the spread layer as a dispersion mixture with a protein and/or polypeptide. An accurate analytical result is stably obtained by the analytical element.
    Type: Grant
    Filed: January 31, 1986
    Date of Patent: April 3, 1990
    Assignees: Konishiroku Photo Industry Co., Ltd., Chugai Seiyaku Kabushiki Kaisha
    Inventors: Kazumi Arai, Mikio Koyama, Morio Kobayashi, Kenichiro Okaniwa, Takasi Momose, Kunihiro Furukawa, Souichi Zanma
  • Patent number: 4732736
    Abstract: An analytical element for the detection of hydrogen peroxide comprising a peroxidase-functional material, a hydrogen donor and a coupler, wherein the peroxidase-functional material and hydrogen donor are arranged so as to be separate from each other, for example in separate layers, but are made interactive by the application of a fluid sample.
    Type: Grant
    Filed: November 15, 1985
    Date of Patent: March 22, 1988
    Assignees: Konishiroku Photo Industry Co., Ltd., Chugai Seiyaku Kabushiki Kaisha
    Inventors: Morio Kobayashi, Kenichiro Okaniwa, Mikio Koyama, Kunihiro Furukawa, Soichi Zanma
  • Patent number: 4613567
    Abstract: There is disclosed an immunoassay comprising carrying out an immunological reaction by contacting a fluid sample with an element for immunoassay, having at least three layers of a first detecting layer, a blocking layer and a second detecting layer which are successively laminated, the element containing a substance capable of binding specifically to an immunologically active substance in a fluid sample only in either one of the first and the second detecting layers, and then measuring the detected quantities corresponding to the immunological reaction quantities from both of the first and the second detecting layers.The immunoassay by the use of the immunological analytical element according to this invention improves the precision immunoassay by measuring both of Bound and Free.
    Type: Grant
    Filed: August 3, 1983
    Date of Patent: September 23, 1986
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Seikichi Yasoshima, Mikio Koyama, Kenichiro Okaniwa
  • Patent number: 4594224
    Abstract: There is presented an improved simple quantitative analytical element for analysis of components in a body fluid such as blood, having a reagent layer constituted of a hydrophilic colloid containing at least one reagent reactive with a component in a liquid sample provided on a support, and also a development layer of a fibrous structure on the reagent layer on the opposite side to the support. A liquid sample can be distributed uniformly through the reagent layer to enable quantitative analysis.
    Type: Grant
    Filed: April 9, 1984
    Date of Patent: June 10, 1986
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Kenichiro Okaniwa, Shozo Kikugawa, Mikio Koyama
  • Patent number: 4594225
    Abstract: An improved multilayer analytical element for the determination of calcium comprising a liquid impermeable, optically transparent support; at least one reagent layer positioned with a first side on said support and containing at least one reagent capable of reacting with a calcium component in a fluid sample; and at least one porous developing layer on the second side of said reagent layer, said porous developing layer being permeable to calcium from said fluid sample thereby transporting said calcium to said reagent layer. The improvement comprises at least one of said reagent layer and developing layer containing a basic substance of the formula M.sub.v H.sub.w PO.sub.4 .multidot.ZH.sub.
    Type: Grant
    Filed: September 13, 1985
    Date of Patent: June 10, 1986
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Kazumi Arai, Mikio Koyama, Kenichiro Okaniwa
  • Patent number: 4576793
    Abstract: There is disclosed an analytical element comprising a support; a reagent layer which is positioned on one side of the support and contains a reagent reactive with a component in a fluid sample; and a porous spreading layer which is positioned on the reagent layer on the opposite side to that of the support for permitting the component in the fluid sample to permeate into the reagent layer; wherein at least one layer contains 5% by weight or more of a polymer formed by, (i) a copolymerizable ethylenically unsaturated acid with (ii) a copolymerizable ethylenically unsaturated monomer.The analytical element according to the present invention can determine a component in a fluid sample quantitatively.
    Type: Grant
    Filed: August 29, 1983
    Date of Patent: March 18, 1986
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Mikio Koyama, Kenichiro Okaniwa, Masakuni Saruhashi
  • Patent number: 4567136
    Abstract: There is disclosed an analytical element which comprises a support and a reagent layer comprising a peroxidative substance, a diffusion-resistant phenol compound, and an aromatic primary amine compound or its salt which brings about a coupling reaction with said diffusion-resistant phenol compound when oxidized, to thereby produce a dyestuff.
    Type: Grant
    Filed: June 7, 1984
    Date of Patent: January 28, 1986
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Kenichiro Okaniwa, Mikio Koyama, Shozo Kikugawa
  • Patent number: 4567024
    Abstract: An analytical element comprising a light-transmissive and liquid-impervious support having thereon, in order from the support side, at least one reagent layer containing at least one kind of reagent reactive with a component in a fluid sample, a shielding layer and at least one porous spreading layer, said shielding layer comprising at least a white pigment and a substantially water-dispersible reactive polymer which comprises a copolymer having (i) monomeric units which have a reactive group and (ii) at least one kind of other hydrophobic monomer.
    Type: Grant
    Filed: January 10, 1983
    Date of Patent: January 28, 1986
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Mikio Koyama, Kenichiro Okaniwa
  • Patent number: 4557901
    Abstract: An analytical element for use in analysis of a component in an aqueous fluid, comprising(a) a light-transmissive support;(b) a reagent layer; and(c) a porous spreading layer,being characterized in that the reagent layer contains a substantially water-dispersible copolymer obtained by copolymerization of at least one copolymerizable monomer, which is water soluble and has a nonionizable group in the side chain, with at least one copolymerizable hydrophobic monomer.The analytical element of this invention is good with less formation of fogging, higher in color forming density and indicating higher sensitivity.
    Type: Grant
    Filed: October 29, 1982
    Date of Patent: December 10, 1985
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Mikio Koyama, Kenichiro Okaniwa, Masakuni Saruhashi, Yuko Ohmachi
  • Patent number: 4551307
    Abstract: There is disclosed an analytical element comprising a light-transmissive and liquid-impermeable support and at least one developing layer of a fibrous structure containing at least one kind of interactive composition reactive with a component in a liquid sample, characterized in that the fiber constituting the developing layer of a fibrous structure and the interactive composition are bonded to each other by a compound having a reactive group. A quantitative analysis of a specific component in a liquid sample can effectively be carried out by using the analytical element according to this invention.
    Type: Grant
    Filed: May 25, 1982
    Date of Patent: November 5, 1985
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Mikio Koyama, Shozo Kikugawa, Kenichiro Okaniwa
  • Patent number: 4486537
    Abstract: An analytical element comprising a light-transmissive and liquid-impervious support, at least one reagent layer containing at least one reagent which reacts with a component in a fluid sample and at least one development layer provided at a position on the reagent layer on the opposite side to that of the support for permitting the component in said fluid sample to permeate into the reagent layer, at least one layer of reagent layers being constituted of polymeric particulate units each having a core-shell multi-layer structure comprising a core, which is hydrophobic and substantially unswellable with a fluid sample, and a hydrophilic outer shell.
    Type: Grant
    Filed: September 20, 1982
    Date of Patent: December 4, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Mikio Koyama, Kenichiro Okaniwa
  • Patent number: 4430436
    Abstract: An analytical element for analysis of a liquid having an interconnected void structure zone positioned on one side of a liquid-impermeable, light-transmissive support, being characterized in that said interconnected void structure zone comprises a bound particulate structure which is a three-dimensional lattice, being non-swellable in the liquid and having interconnected voids with a void volume of 25 to 85% among the particles to provide transport of said liquid, the material for said bound particulate structure being non-swellable in and impermeable to said liquid and said bound particulate structure being constituted of heat-stable, organic polymer particle units having reactive groups with particle sizes of 1 to 350 microns which are chemically bonded directly to each other through said reactive groups in the areas of contact. A method of analysis utilizing the analytical element in immunoassay is also disclosed.
    Type: Grant
    Filed: December 9, 1981
    Date of Patent: February 7, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Mikio Koyama, Shozo Kikugawa, Kenichiro Okaniwa, Kiyoshi Tamaki
  • Patent number: 4427632
    Abstract: An analytical element which comprises (a) a light-transmissive and liquid-impermeable support, (b) at least one reagent layer containing at least one reagent reactive with a component in a liquid sample and being constituted of a hydrophilic colloid, and (c) at least one developing layer of a fibrous structure being positioned on said reagent layer on the side opposite to said support for permitting the component in said liquid sample to permeate therethrough toward said reagent layer and having been formed by coating said reagent layer with a dispersion comprising an organic macromolecular polymer having reactive groups and a fibrous material.
    Type: Grant
    Filed: April 22, 1982
    Date of Patent: January 24, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Kenichiro Okaniwa, Mikio Koyama, Shozo Kikugawa
  • Patent number: 4390617
    Abstract: The present invention is directed towards a silver halide photographic material which has a reducing agent for silver halide or a precursor thereof and a compound M.sub.1 H.sub.m (PO.sub.n).sub.i.jH.sub.2 O which generates base when heat is applied. M is a metal from the Groups IA and IIA of the Periodic Table, 1 and i are individually integers from 1 to 3, m is an integer from 0 to 4, n is 3 or 4, and j is an integer from 0 to 12.
    Type: Grant
    Filed: March 5, 1981
    Date of Patent: June 28, 1983
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Kenichiro Okaniwa, Toyoaki Masukawa, Kiyoshi Yamashita, Wataru Ishikawa
  • Patent number: 4373017
    Abstract: A photosensitive material having a photosensitive layer provided on a support which photosensitive layer comprises a photosensitive compound which forms a color dye directly under irradiation of ultraviolet rays, the compound being represented by the formula [i]: ##STR1## wherein [COUP] represent a 4-equivalent yellow, magenta or cyan coupler from which a hydrogen is removed at a coupling position thereof, B is a hydroxy group or ##STR2## wherein R.sup.6 and R.sup.7 are individually an alkyl group or they may form a 1-piperidino, 1-piperazino, 1-pyrolidino or 4-morpholino group together with each other,R.sup.1 is an alkyl, aryl, alkylamino or arylamino group, and R.sup.2, R.sup.3, R.sup.4 and R.sup.5 individually are a hydrogen or halogen atom or aliphatic or aromatic group, or R.sup.2 and R.sup.3 may be fused to form a naphthalene ring.
    Type: Grant
    Filed: March 5, 1981
    Date of Patent: February 8, 1983
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Toyoaki Masukawa, Wataru Ishikawa, Kenichiro Okaniwa, Kiyoshi Yamashita
  • Patent number: 4268621
    Abstract: A light-sensitive silver halide photographic material of internal latent image type for use in the formation of a direct positive image containing a compound of the following general formula (I) or (II):General formula (I) ##STR1## General formula (II) ##STR2## The photographic material can be developed after a shortened induction period, can yield good positive images that are free from stain when undergoing fogging development, and can yield good direct positive images with a high maximum density and a low minimum density. The photographic material forms a direct positive image when subjected, after imagewise exposure, to an overall light exposure or development in the presence of a fogging agent and can be developed by surface development.
    Type: Grant
    Filed: July 27, 1979
    Date of Patent: May 19, 1981
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Keiji Ogi, Takashi Sasaki, Kenichiro Okaniwa, Yasuo Tosaka
  • Patent number: 4252893
    Abstract: A photographic material having a light-sensitive silver halide emulsion layer coated on a support. The material contains a compound represented by the following general formula [Ia] or [Ib] ##STR1## wherein R.sub.1 and R.sub.3 individually represent an alkyl, alkenyl or acyl group; R.sub.4 represents a halogen atom, an alkyl, alkenyl, cycloalkyl or cyano group, or --SO.sub.2 R.sub.5 or --COR.sub.5 group; and R.sub.5 represents a hydrogen atom, a hydroxy, alkyl, alkoxy, cycloalkoxy, aryloxy or amino group.
    Type: Grant
    Filed: April 11, 1979
    Date of Patent: February 24, 1981
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Masao Iwamuro, Kenichiro Okaniwa, Takashi Sasaki, Shizuo Saito, Eiichi Sakamoto