Patents by Inventor Peter Custer

Peter Custer 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).

  • Liquid nitrogen printing process and apparatus and toner composition
    Patent number: 5761583
    Abstract: A cryogenic liquid, particularly liquid nitrogen, is used as a non-conductive fluid medium for freezing paper and as the liquid toner for electrostatic imaging. A web or sheet of paper is frozen using the cryogenic liquid to provide a dielectric surface for charged image areas to adhere to. The cryogenic liquid based toner carrier is particularly suitable for use in printing processes wherein a latent charge image is developed.
    Type: Grant
    Filed: September 25, 1996
    Date of Patent: June 2, 1998
    Inventor: Peter Custer
  • Invisible, x-ray opaque fluorescent printing medium for multiplex reading
    Patent number: 5522921
    Abstract: Materials for printing information that are invisible under normal white or visible light but are x-ray opaque and ultraviolet fluorescent or absorbent are used for multiplex reading. The invention permits a reader to use x-ray radiation, ultraviolet light or visible light to read printed information. With the x-ray reading capability it is possible to read pages in sealed envelopes, thick documents or unopened attache cases.
    Type: Grant
    Filed: October 11, 1994
    Date of Patent: June 4, 1996
    Inventor: Peter Custer