Patents by Inventor Jurgen Weidlich

Jurgen Weidlich 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).

  • Process for obtaining a photochromic compound and products obtained
    Patent number: 5916487
    Abstract: The invention relates to a process for obtaining a photochromic compound based on a transparent polymer matrix, in which:a) a silver sol is prepared comprising at least one essentially transparent polymer matrix and particles of silver of a mean size smaller than 500 nm,b) an emulsion is produced by mixing the said silver sol with an oxidizing agent in the presence of at least one halogen and/or pseudohalogen.The invention also relates to the compound obtained and, lastly, a transparent substrate coated with at least one layer consisting essentially of such a compound.
    Type: Grant
    Filed: July 3, 1997
    Date of Patent: June 29, 1999
    Assignee: Saint Gobain Vitrage
    Inventors: Jurgen Weidlich, Udo Dieckmann, Otto Volker