Patents by Inventor Casper Johannes Gerardus Ferdinand Janssen

Casper Johannes Gerardus Ferdinand Janssen 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 electrically conductive metal layers on substrates
    Patent number: 4084968
    Abstract: Method of metallizing, according to a pattern or uniformly, substrates which consist of a resin which contains either throughout its bulk or in a surface layer, a photosensitive semiconductive oxide, which after exposure to light is capable of depositing metal nuclei from a solution of copper ions or ions of a nobler metal, which nuclei are intensified in mass, while by way of pre-treatment the substrate is treated with a dipolar aprotic swelling agent and then with a chemical roughening agent.
    Type: Grant
    Filed: November 3, 1975
    Date of Patent: April 18, 1978
    Assignee: U.S. Philips Corporation
    Inventors: Casper Johannes Gerardus Ferdinand Janssen, Lambertus Postma, Gerardus Johannes Meinardus Lippits