Patents by Inventor Robert D. Spradling

Robert D. Spradling 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).

  • Antisurge outlet apparatus for use in electrolytic cells
    Patent number: 4839012
    Abstract: The invention is a dampening device for use in a vertically disposed electrochemical cell unit of the type at least having: (a) a peripheral flange which defines at least one electrode chamber, said peripheral flange having a upper, substantially horizontally disposed flange portion, a lower substantially horizontally disposed flange portion, and two disposed side flange portions; and (b) at least one outlet port passing through the upper horizontally disposed flange portion or through one of the two vertical side flange portions or through the lower flange portion and connecting the exterior of the cell with the electrode chamber.
    Type: Grant
    Filed: January 5, 1988
    Date of Patent: June 13, 1989
    Assignee: The Dow Chemical Company
    Inventors: Harry S. Burney, Jr., Gregory J. E. Morris, Richard N. Beaver, Robert D. Spradling
  • Process for preparing tetrahalopyridine
    Patent number: 4824533
    Abstract: Symmetrical or 2,3,5,6-tetrahalopyridine is prepared from pentahalopyridine in an electrolytic cell by forming an organic solvent-free emulsion of pentahalopyridine and tetrahalopyridine and by electrolyzing the emulsion.
    Type: Grant
    Filed: August 22, 1986
    Date of Patent: April 25, 1989
    Assignee: The Dow Chemical Company
    Inventors: George E. Ham, Robert D. Spradling, John M. McIntyre
  • Brine treatment using ethylene carboxylic acid polymers
    Patent number: 4747957
    Abstract: Hardness values (Ca.sup.++ and Mg.sup.++) and other polyvalent metal cations are removed from alkali metal brines (esp. NaCl) by using a high surface area ethylene/carboxylic acid polymer (esp. porous ethylene/acrylic acid copolymers).
    Type: Grant
    Filed: September 16, 1985
    Date of Patent: May 31, 1988
    Assignee: The Dow Chemical Company
    Inventors: Walter L. Vaughn, Harry S. Burney, Robert D. Spradling, Robert R. Frable