Patents by Inventor Ryo Kobirumaki

Ryo Kobirumaki 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).

  • Desensitizing solution for offset printing
    Patent number: 5695912
    Abstract: A desensitizing solution for offset printing is provided, which is characterized by containing an inorganic ionic polymer of basic aluminum chloride or a derivative thereof, represented by the general formula ?Al.sub.2 (OH).sub.n Cl.sub.6-n !.sub.m where 0<n<6 and m>1. The amount of basic aluminum chloride or a derivative is 5 to 50% by weight and the pH of the solution is 2 to 5. This solution can be free from a ferrocyanic or ferricyanic compound but provide a hydrophilic coating layer with a strong physical strength on a non-image area.
    Type: Grant
    Filed: July 3, 1996
    Date of Patent: December 9, 1997
    Assignee: Iwatsu Electric Co., Ltd.
    Inventors: Hayato Hyakutake, Hirotsuga Saito, Ryo Kobirumaki
  • Liquid developer for electrostatic photography
    Patent number: 4886730
    Abstract: A life of a starting liquid developer for electrostatic photography is prolonged by using a supplemental developer that returns an electrically charged state of the developer varied by repeated use of the developer to an original or appropriate state of the electrical charge for electrostatic photography.
    Type: Grant
    Filed: July 11, 1988
    Date of Patent: December 12, 1989
    Assignee: Iwatsu Electric Co., Ltd.
    Inventors: Ikuo Oto, Hayato Hyakutake, Ryo Kobirumaki