Patents by Inventor Terukuni Tsuneda

Terukuni Tsuneda 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).

  • Method for preventing degradation of a liquid developer for electrostatic recording
    Patent number: 4269921
    Abstract: Degradation of a liquid developer for developing electrostatic latent images is prevented by using a paper from which a rosin aluminum soap is not substantially eluted into the liquid developer when contacted therewith.
    Type: Grant
    Filed: March 12, 1979
    Date of Patent: May 26, 1981
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroshi Tanaka, Terukuni Tsuneda
  • Liquid developer for electrostatic latent image
    Patent number: 4259428
    Abstract: A liquid developer for electrostatic latent images wherein a surface active agent and a terpene polymer are dispersed in a highly insulative carrier liquid together with a toner to encapsulate the toner particles with the polymer.
    Type: Grant
    Filed: January 23, 1980
    Date of Patent: March 31, 1981
    Assignee: Canon Kabushiki Kaisha
    Inventor: Terukuni Tsuneda
  • Method for preventing degradation of a liquid developer for electrostatic recording
    Patent number: 4194020
    Abstract: Degradation of a liquid developer for developing electrostatic latent images is prevented by using a paper from which a rosin aluminum soap is not substantially eluted into the liquid developer when contacted therewith.
    Type: Grant
    Filed: August 5, 1977
    Date of Patent: March 18, 1980
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroshi Tanaka, Terukuni Tsuneda
  • Liquid developer for developing an electrostatic latent image
    Patent number: 4040970
    Abstract: A liquid developer for developing an electrostatic latent image comprising an electrically insulating carrier liquid and a toner dispersed therein comprises a copolymer having a property of rendering the toner negatively chargeable.
    Type: Grant
    Filed: May 8, 1975
    Date of Patent: August 9, 1977
    Assignee: Canon Kabushiki Kaisha
    Inventor: Terukuni Tsuneda
  • Liquid developer comprising heat treated rubber for use in development of an electrostatic latent image and method of making developer
    Patent number: 3998746
    Abstract: A liquid developer for an electrostatic latent image according to the present invention comprises an insulating carrier liquid containing therein a dispersed toner composed of colored particles coated with at least one rubber selected from the group consisting of natural rubber, styrene-butadiene rubber and vinyltoluene-butadiene rubber, each of the rubber components having been subjected to a heat treatment at a temperature not lower than 150.degree. C prior to being coated on said colored particles.
    Type: Grant
    Filed: October 31, 1974
    Date of Patent: December 21, 1976
    Assignee: Canon Kabushiki Kaisha
    Inventor: Terukuni Tsuneda
  • Liquid developer for use in development of an electrostatic latent image comprising a copolymer containing an amino group converted into a quaternary ammonium salt or hydroxide
    Patent number: 3977983
    Abstract: A liquid developer for use in development of an electrostatic latent image comprising an electrically insulating carrier liquid and a toner dispersed therein comprises a copolymer wherein the amino group thereof is converted into a quaternary ammonium salt or a quaternary ammonium hydroxide as a chargeability controlling agent for controlling the toner so as to be negative chargeable. The copolymer is prepared from at least three kinds of the specified monomers.
    Type: Grant
    Filed: May 8, 1975
    Date of Patent: August 31, 1976
    Assignee: Canon Kabushiki Kaisha
    Inventor: Terukuni Tsuneda
  • Liquid developer for electrophotography and process for developing latent images
    Patent number: 3969238
    Abstract: A liquid developer for electrophotography and a process for developing latent images using the liquid developer. The liquid developer comprises a highly insulating carrier liquid, a toner particle dispersed therein, and a copolymer produced from at least one member selected from the monomers of the formula (1) and at least one member selected from the monomers of the formula (2) or a copolymer produced from at least one member selected from the monomers of the formula (1), at least one member selected from the monomers of the formula (2) and at least one member selected from the monomers of the formula (3).
    Type: Grant
    Filed: August 10, 1973
    Date of Patent: July 13, 1976
    Assignee: Canon Kabushiki Kaisha
    Inventor: Terukuni Tsuneda