Patents by Inventor Lysle I. Benjamen

Lysle I. Benjamen 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).

  • Blasting media and method of manufacture comprising polycarbonate and ethylene-carbon monoxide-vinyl acetate terpolymer
    Patent number: 4218547
    Abstract: In accordance with the invention there is provided a blasting media, particularly useful for deflashing and deburring, consisting of small cylindrical pellets of a resin material containing from 1% to 8% by weight ethylene-carbon monoxide-vinyl acetate terpolymer and the remainder substantially all polycarbonate resin. Further in accordance with the invention, such blasting media is made by simultaneously heating and mixing a mixture of the polycarbonate resin and terpolymer in the proportions specified, to render the mixture molten, extruding the mixture to cylindrical shape and cutting the extruded mixture into pellets.
    Type: Grant
    Filed: October 11, 1978
    Date of Patent: August 19, 1980
    Assignee: Henry D. Ellis
    Inventors: Henry D. Ellis, Lysle I. Benjamen