TREA

W. Douglas Obal

Follow

Person

  • West Chester, PA, US
People

Patents Grantslast 30 patents

  • Information Patent Grant

    Process for forming a non-stick surface on the interior surface of...
    • Patent number 8,685,493
    • Issue date Apr 1, 2014
    • E I du Pont de Nemours and Company
    • Laurence Waino McKeen
    • B05 - SPRAYING OR ATOMISING IN GENERAL APPLYING LIQUIDS OR OTHER FLUENT MATER...
  • Information Patent Grant

    System of pipes for use in oil wells
    • Patent number 8,453,740
    • Issue date Jun 4, 2013
    • E. I. Du Pont de Nemours and Company
    • Pidatala K. Mohan
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Process for forming a nonstick surface on the interior surface of a...
    • Patent number 8,211,497
    • Issue date Jul 3, 2012
    • E. I. Du Pont de Nemours and Company
    • Laurence Waino McKeen
    • B05 - SPRAYING OR ATOMISING IN GENERAL APPLYING LIQUIDS OR OTHER FLUENT MATER...
  • Information Patent Grant

    Coated pipes for harsh environments
    • Patent number 7,870,877
    • Issue date Jan 18, 2011
    • E. I. Du Pont de Nemours and Company
    • Laurence Waino McKeen
    • B05 - SPRAYING OR ATOMISING IN GENERAL APPLYING LIQUIDS OR OTHER FLUENT MATER...
  • Information Patent Grant

    Coated pipes for harsh environments
    • Patent number 7,588,058
    • Issue date Sep 15, 2009
    • E. I. Du Pont de Nemours and Company
    • Laurence Waino McKeen
    • B05 - SPRAYING OR ATOMISING IN GENERAL APPLYING LIQUIDS OR OTHER FLUENT MATER...

Patents Applicationslast 30 patents

  • Information Patent Application

    LINED PIPES FOR CONVEYING CHEMICALS
    • Publication number 20120241086
    • Publication date Sep 27, 2012
    • E.I. du Pont de Nemours and Company
    • Laurence Waino McKeen
    • B32 - LAYERED PRODUCTS
  • Information Patent Application

    System of Pipes for Use in Oil Wells
    • Publication number 20110041924
    • Publication date Feb 24, 2011
    • E.I. du Pont de Nemours and Company
    • Pidatala K. Mohan
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Lined Pipes for Conveying Chemicals
    • Publication number 20100043905
    • Publication date Feb 25, 2010
    • E.I. du Pont de Nemours and Company
    • Laurence Waino McKeen
    • B32 - LAYERED PRODUCTS
  • Information Patent Application

    Lined Vessels for Conveying Chemicals
    • Publication number 20100043885
    • Publication date Feb 25, 2010
    • E.I. du Pont de Nemours and Company
    • Laurence Waino McKeen
    • B32 - LAYERED PRODUCTS
  • Information Patent Application

    Coated Pipes for Harsh Environments
    • Publication number 20090265913
    • Publication date Oct 29, 2009
    • E.I. du Pont de Nemours and Company
    • Laurence Waino McKeen
    • B32 - LAYERED PRODUCTS
  • Information Patent Application

    Coated pipes for harsh environments
    • Publication number 20060137757
    • Publication date Jun 29, 2006
    • Laurence Waino McKeen
    • B32 - LAYERED PRODUCTS
  • Information Patent Application

    System of pipes for use in oil wells
    • Publication number 20060127622
    • Publication date Jun 15, 2006
    • Pidatala K. Mohan
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Lined vessels for conveying chemicals
    • Publication number 20050229992
    • Publication date Oct 20, 2005
    • Laurence Waino McKeen
    • B32 - LAYERED PRODUCTS
  • Information Patent Application

    Cooking device with disposable insert
    • Publication number 20020017516
    • Publication date Feb 14, 2002
    • Laurence W. McKeen
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...