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Walton W. Welna

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  • Woodbury, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Intumescent fire sealing composition
    • Patent number 6,747,074
    • Issue date Jun 8, 2004
    • 3M Innovative Properties Company
    • Mark R. Buckingham
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Intumescent putty
    • Patent number 5,578,671
    • Issue date Nov 26, 1996
    • Minnesota Mining and Manufacturing Company
    • Walton W. Welna
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Intumescent composition exhibiting improved long-term expansion and...
    • Patent number 5,476,891
    • Issue date Dec 19, 1995
    • Minnesota Mining and Manufacturing Company
    • Walton W. Welna
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Compressible fireproof seal
    • Patent number 4,952,615
    • Issue date Aug 28, 1990
    • Minnesota Mining and Manufacturing Company
    • Walton W. Welna
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...