Patents by Inventor Henry A. Crivelli

Henry A. Crivelli 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).

  • Incorporation of rubber tire crumbs and siliceous crystalline grains in construction products
    Patent number: 5258222
    Abstract: A rubber tire recycling process comprises the steps of granulating rubber tires to form coarse rubber crumbs, mixing the coarse rubber crumbs with coarse siliceous grains to form a closely packed mixture of coarse particles that are roughly commensurate in size, thoroughly wetting the surfaces of the coarse particles with a polymerizable liquid binder to provide a viscous slurry, casting the slurry into a sheet-like configuration, and curing the sheet-like configuration under sufficient heat and for a sufficient time to provide an environmentally compatible sheet-like product, e.g. a paver or tile for driveways, or a shingle for roof tops, that is characterized by excellent weather, wear and chemical resistance. The surface characteristics of the coarse particles of vulcanized rubber and crystalline grains are critical to the present invention.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: November 2, 1993
    Inventor: Henry A. Crivelli