TREA

James D. Luedtke

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  • St. Paul, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Solid phase extraction medium
    • Patent number RE36811
    • Issue date Aug 8, 2000
    • Minnesota Mining and Manufacturing Co.
    • Craig G. Markell
    • 210 - Liquid purification or separation
  • Information Patent Grant

    Solid phase extraction medium
    • Patent number 5,279,742
    • Issue date Jan 18, 1994
    • Minnesota Mining and Manufacturing Company
    • Craig G. Markell
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL