TREA

Victor S. C. Chang

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  • Ellicott City, MD, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Birefringent interference polarization
    • Patent number 6,583,930
    • Issue date Jun 24, 2003
    • 3M Innovative Properties
    • Walter J. Schrenk
    • G02 - OPTICS
  • Information Patent Grant

    Birefringent interference polarizer
    • Patent number 5,872,653
    • Issue date Feb 16, 1999
    • Minnesota Mining and Manufacturing Company
    • Walter J. Schrenk
    • B32 - LAYERED PRODUCTS
  • Information Patent Grant

    Birefringent interference polarizer
    • Patent number 5,612,820
    • Issue date Mar 18, 1997
    • The Dow Chemical Company
    • Walter J. Schrenk
    • B32 - LAYERED PRODUCTS
  • Information Patent Grant

    Birefringent interference polarizer
    • Patent number 5,486,949
    • Issue date Jan 23, 1996
    • The Dow Chemical Company
    • Walter J. Schrenk
    • B32 - LAYERED PRODUCTS
  • Information Patent Grant

    Battery separator
    • Patent number 5,389,433
    • Issue date Feb 14, 1995
    • W. R. Grace & Co.-Conn.
    • Victor S. C. Chang
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Battery separator
    • Patent number 5,389,463
    • Issue date Feb 14, 1995
    • W. R. Grace & Co.-Conn.
    • Victor S. Chang
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Battery separator
    • Patent number 5,362,581
    • Issue date Nov 8, 1994
    • W. R. Grace & Co.-Conn.
    • Victor S. Chang
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Battery separator
    • Patent number 5,362,582
    • Issue date Nov 8, 1994
    • W. R. Grace & Co.-Conn.
    • Victor S. Chang
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Microporous polyurethane based battery separator
    • Patent number 5,346,788
    • Issue date Sep 13, 1994
    • W. R. Grace & Co.-Conn.
    • Victor S. C. Chang
    • H01 - BASIC ELECTRIC ELEMENTS