Patents by Inventor Takashi Iijima

Takashi Iijima 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: 4683182
    Abstract: The present invention relates to a rechargeable negative electrode for an electrochemical apparatus using nonaqueous electrolyte, said electrode comprising an alloy comprising Cd and at least one metal selected from the group consisting of Sn, Pb, In and Bi, as well as to a rechargeable electrochemical apparatus comprising a combination of said negative electrode with a positive electrode having reversibility in charge and discharge.The above-mentioned negative electrode reversibly absorbs and desorbs alkali metal ions, as the result of charge and discharge, in nonaqueous electrolyte containing alkali metal ions. It undergoes no pulverization even after repeated charge and discharge and maintains its shape stably, so that it has a long chargeand-discharge life. Further, since it can absorb a large quantity of alkali metal per unit volume, it is of high energy density.
    Type: Grant
    Filed: June 4, 1986
    Date of Patent: July 28, 1987
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Toyoguchi Yoshinori, Junichi Yamaura, Tooru Matsui, Takashi Iijima
  • Patent number: 4658498
    Abstract: An alloy capable of reversibly absorbing and desorbing lithium ions in a non-aqueous electrolyte containing lithium ions on charging and discharging has excellent applicability to anode for rechargeable electrochemical devices. However, such alloy, when absorbed with lithium, loses its flexibility, so that when it is incorporated in a device in a charged state, it is subject to trouble such as cracking and can not display its properties. This invention adopts a method in which anode alloy is combined with lithium by connecting them so as to be electronically conductive to each other and this combination is fitted into the device, and then the electrolyte is supplied into the device to have lithium absorbed in anode alloy in the device. According to this method, cracking of cathode can be prevented.
    Type: Grant
    Filed: December 4, 1984
    Date of Patent: April 21, 1987
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Junichi Yamaura, Yoshinori Toyoguchi, Tooru Matsui, Takashi Iijima
  • Patent number: 4608324
    Abstract: An organic electrolyte cell using copper oxide as a cathode active material and lithium or a lithium base alloy as an anode active material has a high energy density and is interchangeable with a general-purpose cell, but it has a disadvantage of voltage drop at an initial discharge stage. The present invention incorporates chalcopyrite as an active material into the copper oxide to eliminate the disadvantage, so that the cell may be used as an electric source for a precision electronic device such as an electronic watch. Furthermore, the present invention improves the efficiency of discharge of the copper oxide itself.
    Type: Grant
    Filed: July 8, 1985
    Date of Patent: August 26, 1986
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takabumi Fujii, Takashi Iijima
  • Patent number: 4434229
    Abstract: Immobilization of enzymes is carried out by covering the surface of a solid support with an enzyme and then contacting the enzyme with an immobilizing reagent in the vapor phase. The immobilizing reagent is preferably an aldehyde or a polymerized aldehyde. By having the immobilizing reagent in vapor phase, the immobilizing reagent concentration can be easily controlled by the vapor pressure. Additionally, there is obtained a uniform covering of immobilized enzyme on the support, and support surfaces which are uneven or curved can be covered with immobilized enzyme regardless of size.
    Type: Grant
    Filed: March 16, 1982
    Date of Patent: February 28, 1984
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shiro Nankai, Ken-ichi Nakamura, Takashi Iijima
  • Patent number: 4431507
    Abstract: The disclosure is directed to an improved enzyme electrode which includes a first electrode having at least one kind of an enzyme immobilized on it for electrochemically detecting a substance to be produced in association with a reaction based on the enzyme, and a second electrode for electrochemically removing materials which interfere with the detection by the first electrode. The second electrode is disposed at the side of a test solution containing a substrate of the enzyme with respect to the first electrode.
    Type: Grant
    Filed: January 12, 1982
    Date of Patent: February 14, 1984
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shiro Nankai, Akihiro Imai, Takashi Iijima
  • Patent number: 4392933
    Abstract: An immobilized enzyme electrode effective in measurement of the substrate concentration of the enzyme and in conversion from enzyme reaction energies into electric energies. The immobilized enzyme, of an oxidase system, such as glucose oxidase, amino acid oxidase, xanthine oxidase or the like and a metal oxide capable of constituting a redox system which is reduced through coupling with these enzyme reactions and is electrochemically oxidized (anodic oxidation) are combined with each other. The use of the enzyme electrode allows the determination quantity of the enzyme substrate as extremely low as approximately 10.sup.-5 to 10.sup.-6 mole/l in concentration.
    Type: Grant
    Filed: March 15, 1982
    Date of Patent: July 12, 1983
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kenichi Nakamura, Shiro Nankai, Takashi Iijima
  • Patent number: 4376689
    Abstract: Improvements in a coenzyme electrode used to electrochemically measure the activity of enzyme or substrate concentration of the enzyme easily. The coenzyme is immobilized, without using a semipermeable membrane, on the electron collector directly with the chemical bond, particularly the covalent bond, whereby the activity of the oxide-reductase requiring the coenzyme can be measured. In addition, the oxide-reductase requiring the coenzyme is also immobilized together with such immobilized coenzyme to improve the characteristics of the conventional enzyme-coenzyme immobilized electrode.
    Type: Grant
    Filed: November 13, 1981
    Date of Patent: March 15, 1983
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kenichi Nakamura, Shiro Nankai, Takashi Iijima
  • Patent number: 4336315
    Abstract: A cell composed of an anode with a light metal as an active material, a cathode with manganese dioxide as an active material, and an organic electrolyte. The cathode contains an alkaline earth metal oxide. The cell is superior in storage with the swelling of the cell and the increase of the cell impedance is little during the preservation.
    Type: Grant
    Filed: January 21, 1981
    Date of Patent: June 22, 1982
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Nobuo Eda, Takashi Iijima, Yoshinori Toyoguchi
  • Patent number: 4321123
    Abstract: Improvements in a coenzyme electrode used to electrochemically measure the activity of enzyme or substrate concentration of the enzyme easily. The coenzyme is immobilized, without using a semipermeable membrane, on the electron collector directly with the chemical bond, particularly the covalent bond, whereby the activity of the oxido-reductase requiring the coenzyme can be measured. In addition, the oxido-reductase requiring the coenzyme is also immobilized together with such immobilized coenzyme to improve the characteristics of the conventional enzyme-coenzyme immobilized electrode.
    Type: Grant
    Filed: October 6, 1980
    Date of Patent: March 23, 1982
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kenichi Nakamura, Shiro Nankai, Takashi Iijima
  • Patent number: 4271242
    Abstract: An improved active material for the positive electrode of a battery comprising carbon fluoride obtained by fluorinating carbon having a lattice constant of 3.40-3.50 A in its (002) plane. The carbon is selected from among petroleum cokes and coal cokes. The resulting battery has excellent discharge and shelf life characteristics.
    Type: Grant
    Filed: December 14, 1979
    Date of Patent: June 2, 1981
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshinori Toyoguchi, Takashi Iijima, Masataro Fukuda
  • Patent number: 4224125
    Abstract: An enzyme electrode, which comprises an oxidoreductase including, where necessary, a coenzyme; a redox polymer acting as an electron mediator in an enzymatic reaction; and an electron collector, wherein the oxidoreductase and the redox polymer are both maintained in the immobilized state on or in the neighborhood of the electron collector by either one of the methods of; entrapping them with a semi-permeable membrane in the neighborhood of the electron collector, or chemically superimposing them on the electron collector or moulding them including the electron collector in a unit with the help of chemical treatment.
    Type: Grant
    Filed: September 26, 1978
    Date of Patent: September 23, 1980
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kenichi Nakamura, Shiro Nankai, Takashi Iijima, Masataro Fukuda
  • Patent number: 4184857
    Abstract: A stripping column for removing volatile matter from a slurry containing sedimentary solid matter and the volatile matter, comprising a plurality of trays each consisting of a plurality of tray segments, a baffle plate and a downcomer, each of the tray segments being so formed as to have many inclined slits and inclined flat planes. In one embodiment, this invention relates to a process for such removal using the stripping column.
    Type: Grant
    Filed: January 23, 1978
    Date of Patent: January 22, 1980
    Assignees: JGC Corporation, Nippon Zeon Co., Ltd.
    Inventors: Takashi Iijima, Taizan Suzuki, Yusuke Murayama, Eitaro Nakamura, Shinji Ueno
  • Patent number: 4172927
    Abstract: This invention relates to improvement in an organic electrolyte battery employing a light metal as an anodic material; organic electrolyte; and CuO as a cathodic material.By using, as the cathodic material, the solid solution of alkali metal oxide and CuO as a mother substance, the delivered volumetric energy density of the battery is fairly increased.
    Type: Grant
    Filed: October 6, 1978
    Date of Patent: October 30, 1979
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshinori Toyoguchi, Nobuo Eda, Takashi Iijima
  • Patent number: 4091117
    Abstract: This invention relates to a method for producing fermented milk containing viable bifidobacteria by cultivating a variant of bifidobacteria in a milk medium, characterized in that the variant of bifidobacteria is acid-resistant and can be propagated under an aerobic condition in a pure milk medium which does not contain any growth-promoting substance.
    Type: Grant
    Filed: October 26, 1976
    Date of Patent: May 23, 1978
    Assignee: Kabushiki Kaisha Yakult Honsha
    Inventors: Masahiko Mutai, Mitsuo Mada, Kei Nakajima, Shusei Takahashi, Takashi Nakao, Kiyohiro Shimada, Takashi Iijima
  • Patent number: 4087559
    Abstract: This invention relates to a method for producing fermented milk containing viable bifidobacteria by cultivating a variant of bifidobacteria in a milk medium, characterized in that the variant of bifidobacteria can be propagated under aerobic condition in a pure milk medium which does not contain any growth-promoting substance.
    Type: Grant
    Filed: October 26, 1976
    Date of Patent: May 2, 1978
    Assignee: Kabushiki Kaisha Yakult Honsha
    Inventors: Masahiko Mutai, Mitsuo Mada, Kei Nakajima, Kiyohiro Shimada, Takashi Iijima