Patents by Inventor Tony C. T. Wong

Tony C. T. Wong 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).

  • H.sub.3 PO.sub.4 /HF Siliceous formation treating composition and method
    Patent number: 4561503
    Abstract: A composition for treatment of siliceous formations, comprising an aqueous solution having a phosphoric acid concentration in the range of from about 10 to about 30% by weight, to which is added at least one fluorine donor compound in an amount to provide a generated hydrofluoric acid concentration in the range of from about 1 to about 7% by weight. The composition is quite reactive towards clay and silica but, unlike conventional mud acid, displays significantly retarded reactivity towards calcium carbonate. The preferred fluorine donor is ammonium bifluoride, and an especially effective phosphoric acid solution is a Turflo.RTM. solution, components of which serve to further potentiate calcium carbonate reactivity retardation.
    Type: Grant
    Filed: November 9, 1982
    Date of Patent: December 31, 1985
    Assignee: Amerigo Technology Limited
    Inventor: Tony C. T. Wong