Patents by Inventor Arthur A. Birdsall

Arthur A. Birdsall 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).

  • Silicone resin optical devices
    Patent number: 4198131
    Abstract: Optical devices such as corneal, scleral and interocular lenses are made from phenyl-containing siloxane resins. They combine a high degree of oxygen transmission with ease of fabrication inherent to hard materials, thereby providing increased wearer comfort and ease of fabrication. A typical resin is a copolymer of phenyl, vinyl and methyl siloxanes having at least about 0.2 phenyl groups per silicon.
    Type: Grant
    Filed: May 15, 1978
    Date of Patent: April 15, 1980
    Assignee: Dow Corning Corporation
    Inventors: Arthur A. Birdsall, John K. Fitzgerald, David P. Jones, Keith E. Polmanteer