Patents by Inventor Raul M. Villarreal

Raul M. Villarreal 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).

  • Machine and process for grinding granular particles
    Patent number: 4553703
    Abstract: A grinding process and machine for granular particles comprising two flexible continuously moveable belts which form a cavity separated apart a critical distance. The granular particles rub against each other when the belts relatively moving at different speeds grind the materials to achieve a predetermined condition.
    Type: Grant
    Filed: February 23, 1984
    Date of Patent: November 19, 1985
    Inventor: Raul M. Villarreal