Patents by Inventor Pia I. Santelices

Pia I. Santelices 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).

  • Patent number: 6367930
    Abstract: A process for making a photochromic optical lens is disclosed. In a first embodiment of the process a multi-plied laminate, containing a ply of photochromic thermoplastic polyurethane (herein “TPU”) and a ply containing thermoplastic polycarbonate, is first placed in the cavity of a suitable mold. The ply that contains polycarbonate resin is placed facing the cavity. Thermoplastic polycarbonate resin is then injected into the cavity. In a second embodiment, referred to as an over-mold method, polycarbonate is first injection molded into a molding cavity to form a substrate. Photochromic TPU is, in a subsequent step, injected into the cavity to form a superstrate overlay. In both embodiments, the articles thus molded are suitable for the preparation of optical lenses.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: April 9, 2002
    Assignee: Bayer Corporation
    Inventors: Pia I. Santelices, James N. Rieck, Jack C. Chan, Sivaram Krishnan, William G. Curtis, Robert Allen Pyles