Patents by Inventor Kenneth John Pidgeon

Kenneth John Pidgeon 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).

  • Incorporating photochromic molecules in light transmissible articles
    Patent number: 5959761
    Abstract: A light-transmissible article formed from a polymeric material, which article includes at least one photochromic dye; and a compatible light absorbing material distributed on or within the article; the combination of photochromic dye and compatible light absorbing material is such that the depth of darkening upon activation of photochromic dye is rendered substantially uniform regardless of variations in length, thickness or local changes of surface shape.
    Type: Grant
    Filed: September 8, 1997
    Date of Patent: September 28, 1999
    Assignee: Sola International Holdings Ltd.
    Inventors: Colin Maurice Perrott, Kenneth John Pidgeon
  • Method of preparing photochromic article
    Patent number: 5882556
    Abstract: A process for preparing a cross-linked polymeric article, which process includes: providing a cross-linkable polymeric casting composition; and a photochromic composition; subjecting the cross-linkable polymeric casting composition to partial cure, such that the polymer reaches or exceeds its point of gelation; contacting the partially cured gelled polymer with the photochromic composition; and curing the gelled polymer.
    Type: Grant
    Filed: September 8, 1997
    Date of Patent: March 16, 1999
    Assignee: Sola International Holdings Ltd.
    Inventors: Colin Maurice Perrott, Kenneth John Pidgeon, Helena Kloubek, Ian Michael Threlfall