Patents by Inventor Roger Grondin

Roger Grondin 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).

  • Glass material for treating hard surfaces
    Patent number: 5785579
    Abstract: The glass material for treating hard surfaces by being continually hurled at high velocity against the surfaces, includes substantially particles of broken glass provided from glass parts having a thickness greater than 75/1000 of an inch, the particles having sizes as selected with mesh sieve sizes of grade 5 to grade 60, having sharp edges and having a hardness greater than 5.5 Mohs.
    Type: Grant
    Filed: November 20, 1996
    Date of Patent: July 28, 1998
    Inventor: Roger Grondin