Patents by Inventor Henricus H. M. Vorst

Henricus H. M. Vorst 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 of marking a synthetic material surface and to an object having the marked synthetic material surface
    Patent number: 4401992
    Abstract: A method of marking objects having a surface of a synthetic material and an object having the marked synthetic material for the purpose of identification which method comprises exposing the surface of the synthetic material to a laser beam of light of intensity of at least 1000 kW/cm.sup.2 at the surface of the material and wherein the synthetic material contains a dye and a silicon-containing inorganic compound or a dye comprising silicon, such as, a sulphur containing sodium aluminium silicate which is decomposed to form a color contrast mark on the surface on exposure to said laser beam.
    Type: Grant
    Filed: February 25, 1981
    Date of Patent: August 30, 1983
    Assignee: U.S. Philips Corporation
    Inventors: Henricus H. M. Vorst, Jozef J. J. Bastiaens, Enno C. Munk