Patents by Inventor Peter Spurgeon

Peter Spurgeon 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).

  • Process for the treatment of acidic waste liquid containing dissolved salts
    Patent number: 4006080
    Abstract: A process for the treatment of aqueous sulphuric acid solutions of a metal salt or salts containing ferrous sulphates wherein the pH value of the solution is adjusted by the addition of a calcium compound to selectively precipitate calcium sulphate after which the precipitated calcium sulphate is separated and calcined before adjusting the pH of the mother liquor to a value in the range 7 to 9 by the addition of a calcium-containing compound to precipitate there from solid metal compounds which are then separated and/or calcined.
    Type: Grant
    Filed: October 2, 1975
    Date of Patent: February 1, 1977
    Assignee: Tioxide Group Limited
    Inventors: Walter Twist, Peter Spurgeon