Patents by Inventor William Henry Richardson

William Henry Richardson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Corrosion resistant steels
    Patent number: 4032367
    Abstract: The invention provides a corrosion resistant high strength steel, which has a ferritic/austenitic microstructure consisting of 40 to 60% austenite grains embedded in a ferrite matrix being substantially free of precipitated particles of other phases, the steel consisting of the following elements in proportion by weight:______________________________________ Chromium 26.5% - 30% by weight Nickel 7.4% - 14% by weight Molybdenum 2.0% - 5% by weight Copper 0.5% - 5% by weight Silicon 0.2% - 2% by weight Manganese 0.2% - 4% by weight Carbon 0.01% - 0.1% by weight Nitrogen 0.1% - 0.
    Type: Grant
    Filed: October 8, 1976
    Date of Patent: June 28, 1977
    Assignee: Langley Alloys Limited
    Inventors: William Henry Richardson, Prodyot Guha