Patents by Inventor Nobuo Kawashima

Nobuo Kawashima 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).

  • Halogen-containing resin composition
    Patent number: 4992494
    Abstract: A halogen-containing resin composition comprising (A) 100 parts by weight of a halogen-containing resin, (B) 0.1 to 10 parts by weight of at least one amino acid zinc salt selected from glycine zinc salt and zinc glutamate, (C) 0.10 to 5 parts by weight of at least one carboxylic acid zinc salt selected from basic zinc salts of organic carboxylic acids, and optionally (D) 0.01 to 5 parts by weight of melamine.
    Type: Grant
    Filed: December 19, 1989
    Date of Patent: February 12, 1991
    Assignee: Ferro Corporation
    Inventors: Shoji Odaira, Minoru Fukuda, Nobuo Kawashima, Masato Saito, Motoharu Nakanishi
  • Hollow polymer particles, process for production thereof, and use thereof as pigment
    Patent number: 4972000
    Abstract: Hollow polymer particles having at least two polymer layers, wherein (1) the particles have an average particle diameter in the range of 0.15 to 20 micrometers, (2) each of the particles has an average equivalent hollow diameter/equivalent particle diameter in the range of 0.2 to 0.8, (3) the proportion of a toluene-insoluble portion of the particles is 20 to 90% by weight, (4) the polymer particles have a melt flow rate at 180.degree. C. under 10 kgf/cm.sup.2 of 0.1 to 1 g/10 min., (5) the inside layer of the two polymer layers is composed of a crosslinked polymer and (6) the outside layer of the two polymer layers is composd of a non-crosslinked polymer. This invention also provides hollow crosslinked polymer particles wherein the proportion of a toluene-insoluble portion of the particles exceeds 85% by weight, the melt flow rate of the polymer particles at 180.degree. C. under 10 kgf/cm.sup.2 is less than 0.2 g/10 min., and the outside layer is composed of a crosslinked polymer.
    Type: Grant
    Filed: February 24, 1989
    Date of Patent: November 20, 1990
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Nobuo Kawashima, Fujio Sakurai, Hiroshi Tadenuma
  • Vacuum circuit breaker
    Patent number: 4367382
    Abstract: In a vacuum circuit breaker of the type comprising coil electrodes for producing longitudinal magnetic flux and contacts made of an Ag-WC sintered alloy, the intensity of the magnetic field is made to be higher than 50 gausses/I.sub.B.
    Type: Grant
    Filed: May 24, 1979
    Date of Patent: January 4, 1983
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Hideo Suzuki, Nobuo Kawashima, Satoru Yanabu, Eiichi Takayanagi
  • Vacuum switch
    Patent number: 4234771
    Abstract: In a vacuum vessel having a vacuum vessel defined by an insulating cylinder and end plates, relatively movable first and second contacts and a bellows, there are provided a first metal plate having a reentrant portion, a second metal plate also having a reentrant portion, and an operating mechanism for separating the contacts which operates such that both contacts are positioned in the reentrant portion of the first metal plate at the time of current interruption and one of the contacts is moved into the reentrant portion of the second metal plate after the current interruption.
    Type: Grant
    Filed: December 5, 1977
    Date of Patent: November 18, 1980
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Mikio Ohkawa, Nobuo Kawashima