Patents by Inventor James N. Kaiser

James N. Kaiser 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).

  • Developer composition and method of preparing the same
    Patent number: 5422216
    Abstract: A method for preparing the carrier for a developer composition is provided. The method comprises subjecting a ferric oxide and a metal oxide to conditions sufficient to form a ferrite have a spinel structure, mixing the ferrite having a spinel structure with a sintering agent, and sintering in the liquid phase the mixture at temperature conditions of less than about 1375.degree. C. to provide a ferrite carrier devoid of zinc, copper, or nickel in its crystal structure. The ferrite carrier cab be used in a developer composition comprising the ferrite carrier and a toner composition.
    Type: Grant
    Filed: March 1, 1994
    Date of Patent: June 6, 1995
    Assignee: Steward
    Inventors: Danny R. Smith, James N. Kaiser