Patents by Inventor Ashwin B. Patel

Ashwin B. Patel 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).

  • Increasing the useful range of cationic photoinitiators in stereolithography
    Patent number: 5705116
    Abstract: Polymer precursor formulations suitable for stereolithography may be prepared from compositions containing vinyl ether functionalized compounds and epoxy functionalized compounds plus an effective mount of a cationic photoinitiator and an ultraviolet light-absorbing compound to provide a predetermined depth of cure. Preferably, the ultraviolet light-absorbing compound is anthracene or its derivatives. Anthracenes having pendant alkoxy groups are preferred for use with light wavelengths greater than 360 nm, particularly 9,10-dimethoxy-2-ethyl anthracene.
    Type: Grant
    Filed: June 21, 1995
    Date of Patent: January 6, 1998
    Inventors: Eugene Valentine Sitzmann, Russell Frank Anderson, Darryl Keith Barnes, Ashwin B. Patel