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Dan A. Duke

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  • Temecula, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Water conservation methods combining osmotic membrane processed wat...
    • Patent number 9,315,396
    • Issue date Apr 19, 2016
    • Water Conservation Technology International, Inc.
    • Dan A. Duke
    • C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • Information Patent Grant

    Cooling water scale inhibition method
    • Patent number 8,057,738
    • Issue date Nov 15, 2011
    • Water Conservation Technology International, Inc.
    • Dan A. Duke
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Grant

    Cooling water corrosion inhibition method
    • Patent number 7,955,553
    • Issue date Jun 7, 2011
    • Water Conservation Technology International, Inc.
    • Dan A. Duke
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Grant

    Cooling water corrosion inhibition method
    • Patent number 7,708,939
    • Issue date May 4, 2010
    • Water Conservation Technology International, Inc.
    • Dan A. Duke
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Grant

    Cooling water corrosion inhibition method
    • Patent number 7,517,493
    • Issue date Apr 14, 2009
    • Water Conservation Technology International, Inc.
    • Dan A. Duke
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Grant

    Cooling water scale and corrosion inhibition
    • Patent number 7,122,148
    • Issue date Oct 17, 2006
    • Water Conservation Technologies International
    • Dan A. Duke
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Grant

    Cooling water scale and corrosion inhibition
    • Patent number 6,998,092
    • Issue date Feb 14, 2006
    • Water Conservation Technologies International
    • Dan A. Duke
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Grant

    Cooling water scale and corrosion inhibition
    • Patent number 6,949,193
    • Issue date Sep 27, 2005
    • Water & Enviro Tech Company, Inc.
    • Dan A. Duke
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Grant

    Cooling water scale and corrosion inhibition
    • Patent number 6,929,749
    • Issue date Aug 16, 2005
    • Water & Enviro Tech Company, Inc.
    • Dan A. Duke
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...

Patents Applicationslast 30 patents

  • Information Patent Application

    WATER CONSERVATION METHODS COMBINING OSMOTIC MEMBRANE PROCESSED WAT...
    • Publication number 20120255908
    • Publication date Oct 11, 2012
    • WATER CONSERVATION TECHNOLOGY INTERNATIONAL, INC.
    • DAN A. DUKE
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Application

    COOLING WATER CORROSION INHIBITION METHOD
    • Publication number 20100173071
    • Publication date Jul 8, 2010
    • Dan A. Duke
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Application

    COOLING WATER CORROSION INHIBITION METHOD
    • Publication number 20090159420
    • Publication date Jun 25, 2009
    • Dan A. Duke
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Application

    Cooling water corrosion inhibition method
    • Publication number 20080264870
    • Publication date Oct 30, 2008
    • Dan A. Duke
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Application

    Water softening method and system
    • Publication number 20060169641
    • Publication date Aug 3, 2006
    • Water Enviro Tech Company, Inc.
    • Dan A. Duke
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Application

    Cooling water corrosion inhibition method
    • Publication number 20060151394
    • Publication date Jul 13, 2006
    • Dan A. Duke
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Application

    COOLING WATER SCALE AND CORROSION INHIBITION
    • Publication number 20050218080
    • Publication date Oct 6, 2005
    • WATER & ENVIRO TECH COMPANY, INC.
    • Dan A. Duke
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Application

    COOLING WATER SCALE AND CORROSION INHIBITION
    • Publication number 20050150838
    • Publication date Jul 14, 2005
    • Dan A. Duke
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Application

    COOLING WATER SCALE AND CORROSION INHIBITION
    • Publication number 20050150834
    • Publication date Jul 14, 2005
    • Dan A. Duke
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Application

    Cooling water scale and corrosion inhibition
    • Publication number 20050150839
    • Publication date Jul 14, 2005
    • WATER & ENVIRO TECH COMPANY, INC.
    • Dan A. Duke
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...