John Robert Brown

Person

  • Valparaiso, IN, US

Patents Grantslast 30 patents

  • Information Patent Grant

    Modified gypsum compositions

    • Patent number 5,639,298
    • Issue date Jun 17, 1997
    • Air Products and Chemicals, Inc.
    • F. MacGregor Miller
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES