Patents by Inventor Donald W. Sanders

Donald W. Sanders 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 in situ generation of chlorine dioxide in oil and gas well formations
    Patent number: 6431279
    Abstract: An improved method for the chlorine dioxide treatment of oil and/or gas well bores is provided, which eliminates the need for costly and complex chlorine dioxide-generating equipment and yields very high concentrations of chlorine dioxide down hole. The preferred method involves the introduction of reactant(s) into a well and causing a reaction to generate chlorine dioxide in situ. Chlorite and hypochlorite ion sources (e.g., sodium chlorite and sodium hypochlorite) are introduced into the well along with an acid. The well may then be flushed with water to force the reactants and chloride dioxide downwardly to the well formation.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: August 13, 2002
    Assignee: Jacam Chemicals, L.L.C.
    Inventors: Gene H. Zaid, Donald W. Sanders
  • Mechanized bark hack
    Patent number: 3959925
    Abstract: A tree bark scoring apparatus adapted for transport and for operation aboard a moving, dirigible and speed controllable prime mover.
    Type: Grant
    Filed: April 18, 1975
    Date of Patent: June 1, 1976
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventor: Donald W. Sanders