Patents by Inventor Huan Toh

Huan Toh 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).

  • Photochromic coating process
    Publication number: 20050116381
    Abstract: The present invention provides a method for manufacturing a photochromic article having a photochromic compound containing layer. The method includes the step of coating a casting face of at least one mould section with a photochromic host layer. The photochromic host layer is treated to minimise damage during subsequent steps, and a mould is then assembled so that it includes the mould section having the photochromic host layer. The mould is then filled with a photochromic article monomer composition and the monomer composition is subsequently cured to form a photochromic article substrate adhered to the photochromic host layer. The photochromic compound is introduced into the photochromic host layer.
    Type: Application
    Filed: December 13, 2002
    Publication date: June 2, 2005
    Inventors: Kathy Wong, David Lewis, Fang Chen, Bohdan Gieslinski, Huan Toh