Patents by Inventor Chandra M. Srivastava

Chandra M. Srivastava 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).

  • High temperature performance polymers for stereolithography
    Patent number: 6054250
    Abstract: The present invention relates to polymer precursors used in sterolithography. Specifically, the invention provides a novel resin having a glass transition temperature (Tg) that is substantially higher than any existing resins. The polymer precursors comprise an admixture of at least one vinyl ether, functionalized compound and at least one epoxy functionalized compound, at least one acrylate functionalized compound, and a photoinitiator, wherein the polymer precursor composition cures by a dual cure mechanism utilizing a free radical pathway as well as a cationic pathway thus yielding improved green strength.
    Type: Grant
    Filed: January 26, 1998
    Date of Patent: April 25, 2000
    Assignee: AlliedSignal Inc.
    Inventors: Eugene V. Sitzmann, Russell F. Anderson, Mathias P. Koljack, Julietta G. Cruz, Chandra M. Srivastava