Patents by Inventor Harm H. Heikens

Harm H. Heikens 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).

  • Colored magnetically attractable toner powder, its preparation, and developing images with such powder
    Patent number: 4443527
    Abstract: Colored magnetically attractable toner powder for the development of latent electrostatic or magnetic images consists of particles each comprising a magnetically attractable core, preferably spherical, formed of particulate magnetically attractable material or of a dispersion of such material in a binder, a masking layer enveloping the core and containing binder mixed with light-reflecting pigment of submicron particle size, and coloring material applied in and/or onto the masking layer. Processes for preparing the toner powder are disclosed, and a process for developing electrostatic or magnetic latent image patterns by its use.
    Type: Grant
    Filed: September 2, 1982
    Date of Patent: April 17, 1984
    Assignee: Oce-Nederland B.V.
    Inventors: Harm H. Heikens, Gerardus J. Crommentuyn