Patents by Inventor Leonard R. Carlo

Leonard R. Carlo 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).

  • Patent number: 5990067
    Abstract: A composition and method for cleaning concrete and asphalt surfaces from oil and grease stains includes a combination of various constituents, namely baking soda, calcium carbonate, crushed corn, detergent, fly ash, portland cement and/or kiln dust. Other compositions also include quartz sand, ground corn cobs, microorganisms and coloring agents. The method involves contact of the present formulation with concrete/asphalt surfaces, preferably administered in lines spanning the dimensions of the oil stain to be cleaned. The material is swept over the oil stain with a broom or other suitable device to achieve a relatively uniform application. Water is applied to dampen the formulation, thus activating the detergent in the formulation and to hold down dust during the cleaning operation. The formulation rests on the surface for a sufficient amount of time to permit the detergents and other agents to dissolve and/or otherwise dissipate the oil stain.
    Type: Grant
    Filed: December 4, 1998
    Date of Patent: November 23, 1999
    Inventors: Todd Franssen, Carla Franssen, Leonard R. Carlo