Patents by Inventor Catherine Selvaag

Catherine Selvaag 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: 8789773
    Abstract: A process extracts and reclaims the components of an asphalt-based material having as constituents at least asphalt and one or more solid materials. A solvent for asphalt dissolves the asphalt constituent to form a slurry of asphalt-solvent liquid and the solid materials. The liquid and the solids in the slurry are then separated. The liquid is separated into solvent and asphalt. The solids, when of more than one type, are separated into at least one pure constituent solid. In a preferred embodiment, the process runs in a continuous mode with the various materials flowing as streams into spaces where steps of the process operate. The process can be used for both worn roofing shingles and for asphalt paving.
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: July 29, 2014
    Assignee: Crown Iron Works Company
    Inventors: Floyd Charles Teeter, Jr., Philip Fisher, Catherine Selvaag, Raymond Johnson