Patents by Inventor Leendert K. H. VAN Beek

Leendert K. H. VAN Beek 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 manufacturing an external electrically conducting metal pattern
    Patent number: 4230788
    Abstract: A method of making an electrically conducting metal pattern on a superficially non-conducting support which comprises imagewise exposing to light a photosensitive material containing either a diazosulfide or a diazosulfonate, which produces a light reaction product which is capable of forming free silver and mercury metal from water-soluble silver and mercurous compounds. A mixture of water and at least one solvent from the group consisting of chloroform, toluene, ethylacetate, liquid alcohols and ketones is used in the treatment of the exposed photosensitive material to form a latent image.
    Type: Grant
    Filed: October 11, 1978
    Date of Patent: October 28, 1980
    Assignee: U.S. Philips Corporation
    Inventors: Elisabeth J. Spiertz, Christiaan F. W. Flinsenberg, Leendert K. H. van Beek
  • Method of making copies of information tracks on carriers
    Patent number: 4125401
    Abstract: Copying by photographic means of plates having coded audio and video information of a very fine structure. Use is made of an aromatic diazosulphide as light-sensitive system, wherein, after exposure, a metal nuclei image is produced by contact with metal salt, which metal nuclei image is at or below the surface and which is intensified by means of physical development to an externally reflective and, as such, readable image.
    Type: Grant
    Filed: March 3, 1977
    Date of Patent: November 14, 1978
    Assignee: U.S. Philips Corporation
    Inventors: Elisabeth J. Spiertz, Christiaan F. W. Flinsenberg, Leendert K. H. VAN Beek