Patents by Inventor Gerald L. Shoemaker

Gerald L. Shoemaker 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).

  • Patent number: 4923617
    Abstract: A process for inhibiting the formation of scale in process equipment and conduits that form because of the presence of scale forming salts present in process fluids flowing therein is provided. In this process a scale inhibiting effective amount of an inhibiting agent selected from the group consisting of polymeric sulfates, polymeric sulfonates and mixtures thereof is added to the process fluid.
    Type: Grant
    Filed: December 14, 1988
    Date of Patent: May 8, 1990
    Assignee: Mobil Oil Corporation
    Inventors: Israel J. Heilweil, Gerald L. Shoemaker
  • Patent number: 4590996
    Abstract: The accumulation of inorganic mineral scale such as barium sulfate in oil field formations and/or production equipment is inhibited by adding to formation fluid or produced fluid a scale formation inhibitory amount of a polyalkoxy sulfonate of the general formula(RO[R'O].sub.x (CH.sub.2).sub.y SO.sub.3).sub.z Mwherein R is a hydrophobe, R'O is a C.sub.2 H.sub.4 O or a C.sub.3 H.sub.6 O group or some combination thereof, M is a monovalent or divalet cation, x is 2 to 10, y is 0 to about 4 and z is 1 or 2.
    Type: Grant
    Filed: December 13, 1984
    Date of Patent: May 27, 1986
    Assignee: Mobil Oil Corporation
    Inventors: Dennis H. Hoskin, L. Deane Rollmann, Gerald L. Shoemaker, Kirk D. Schmitt
  • Patent number: 4447311
    Abstract: A dewaxing process for reducing the pour point of waxy oils in which the oil is cooled by direct contact with a liquid autorefrigerant such as propane. The wax which separates upon cooling is removed by flotation assisted by the bubbles of vaporized autorefrigerant which rise through the oil to form a frothy slurry of wax which can be decanted and the wax recovered from it. A dewaxing solvent such as methyl ethyl ketone may be used to assist separation of the wax.
    Type: Grant
    Filed: July 22, 1982
    Date of Patent: May 8, 1984
    Assignee: Mobil Oil Corporation
    Inventors: Patrick E. Fowles, Gerald L. Shoemaker, Tsoung-Yuan Yan