Patents by Inventor Kohshi Iwata

Kohshi Iwata 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).

  • Process for plating shaped articles made of synthetic resins
    Patent number: 4059710
    Abstract: A process for metal plating shaped articles, such as cast or molded articles of synthetic resins, includes the steps of (a) diffusing or scattering numerous fine metal particles (or pieces) over the surface and outermost layer of the articles, (b) etching exposed surfaces of the metal particles, (c) performing thereafter metal plating, (d) and thereby solidly combining or joining the plating layer and the articles through the medium of the fine metal particles, whereby the resulting plated articles are extremely eminent in abrasion and shock resistance which is essentially useful for casting and molding patterns or core boxes.
    Type: Grant
    Filed: July 2, 1976
    Date of Patent: November 22, 1977
    Assignees: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kabushiki Kaisha Maeda Shell Service
    Inventors: Keizo Nishiyama, Sadao Maeda, Kohshi Iwata
  • Process for the manufacture of resin-coated refractory particles, preferably sand
    Patent number: 3944514
    Abstract: A process for the manufacture of resin coated sand by mixing under agitation a mass of sand upon heated and with solid ammonia-catalyzed resol having methylol index 15 - 30 and softening point higher than 80.degree.C.
    Type: Grant
    Filed: March 18, 1974
    Date of Patent: March 16, 1976
    Assignee: Kabushiki Kaisha Jidoshokki Seisakusho
    Inventors: Keizo Nishiyama, Yasushi Yoshida, Mutsumi Yamazaki, Kohshi Iwata, Yoshiaki Tanaka