TREA

David E. Heyer

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  • Circleville, OH, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Film bead heating for simultaneous stretching
    • Patent number 5,753,172
    • Issue date May 19, 1998
    • E. I. Du Pont de Nemours and Company
    • Albert White Forrest
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Vacuum pinning process
    • Patent number 4,783,304
    • Issue date Nov 8, 1988
    • E. I. Du Pont de Nemours and Company
    • David E. Heyer
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Vacuum pinning of molten thermoplastic film to a roughened casting...
    • Patent number 4,501,712
    • Issue date Feb 26, 1985
    • E. I. Du Pont de Nemours and Company
    • David E. Heyer
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Device for uniform web pinning
    • Patent number 4,310,295
    • Issue date Jan 12, 1982
    • E. I. Du Pont de Nemours and Company
    • David E. Heyer
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Pneumatic gauge adjustment of edge-pinned cast web
    • Patent number 4,255,365
    • Issue date Mar 10, 1981
    • E. I. Du Pont de Nemours and Company
    • David E. Heyer
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Production of a flat thermoplastic film by passing the film over a...
    • Patent number 4,017,575
    • Issue date Apr 12, 1977
    • E. I. Du Pont de Nemours and Company
    • David E. Heyer
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL