Patents by Inventor Devi N Rai

Devi N Rai 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).

  • Gel coat composition for in mold finish process
    Patent number: 7150915
    Abstract: Composite articles are prepared by a spray up operation. In a first step, a gel coat is applied onto a mold surface. Next, a barrier coat is applied over the gel coat in the mold and thereafter a laminate formula is applied over the barrier coat. In a preferred embodiment, the multilayer composite has a thickness of about 15 mm or less, and is useful as an automobile body panel. The gel coat contains a curable polyester polyurethane acrylate resin, and the composite article has a surface that has high gloss and color retention after prolonged exposure to ultraviolet radiation.
    Type: Grant
    Filed: July 21, 2003
    Date of Patent: December 19, 2006
    Assignee: General Motors Corporation
    Inventors: Sheila F Kia, Devi N Rai, Hamid G Kia