Patents by Inventor Roger L. Bonafont

Roger L. Bonafont 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).

  • Waterproof sheeting
    Patent number: 4458043
    Abstract: A waterproof sheeting exhibiting improved temperature characteristics and good properties when bonded with molten bitumen comprises by weight 10 to 40 parts of unplasticized PVC, 10 to 40 parts of an ethylene vinyl acetate carbon monoxide terpolymer and 5 to 35 parts of coal tar pitch.
    Type: Grant
    Filed: October 27, 1982
    Date of Patent: July 3, 1984
    Assignee: Coal Industry (Patents) Limited
    Inventors: Edwin L. Evans, Ronald Sidebottom, David W. Price, Roger L. Bonafont