Patents by Inventor Lap T. Cheng

Lap T. Cheng 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).

  • Fluorinated sulfones/ketones for nonlinear optics
    Patent number: 5312930
    Abstract: This invention relates to optical elements capable of second harmonic generation and novel compositions for use in such optical elements comprising polar molecules placed in noncentrosymmetric configuration wherein such optical element has an electron donor moiety linked through a conjugated bonding moiety to an electron acceptor moiety which consists of a selected fluorinated sulfone, fluorinated ketone, fluorinated vinyl sulfone or fluorinated alkyl vinyl sulfone.
    Type: Grant
    Filed: December 31, 1992
    Date of Patent: May 17, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Lap T. Cheng, Andrew E. Feiring, Wilson Tam
  • Fluorinated sulfones/ketones for nonlinear optics
    Patent number: 5120876
    Abstract: This invention relates to optical elements capable of second harmonic generation and novel compositions for use in such optical elements comprising polar molecules placed in noncentrosymmetric configuration wherein such optical element has an electron donor moiety linked through a conjugated bonding moiety to an electron acceptor moiety which consists of a selected fluorinated sulfone, fluorinated ketone, fluorinated vinyl sulfone or fluorinated alkyl vinyl sulfone.
    Type: Grant
    Filed: February 28, 1990
    Date of Patent: June 9, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Lap T. Cheng, Andrew E. Feiring, Wilson Tam