Patents by Inventor Geoffrey J. Ashwell

Geoffrey J. Ashwell 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).

  • Films for non-linear optics
    Patent number: 5510200
    Abstract: Multi-layer Langmuir-Blodgett films comprising alternate layers of an optically non-linear amphiphilic compound and a spacer compound wherein the spacer comprises at least two hydrophobic substituents, have high second order non-linear optical coefficients, are stable over a prolonged period and quadratic SHG enhancement based on the number of layers. They are useful in a variety of opto-electronic devices.
    Type: Grant
    Filed: August 30, 1993
    Date of Patent: April 23, 1996
    Assignee: British Technology Group Limited
    Inventor: Geoffrey J. Ashwell