Patents by Inventor Mark W. Hellums

Mark W. Hellums 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: 5910237
    Abstract: In one embodiment, the present invention relates to a process for recovering organic hydroxide from contaminated solutions containing the organic hydroxide and impurities including charging the contaminated solution to a first electrochemical cell containing at least two compartments, a cathode, an anode and a size selective divider and passing a current through the first electrochemical cell whereby impurities migrate through the size selective divider; recovering a second solution containing organic ions from the first electrochemical cell and charging the second solution to a second electrochemical cell containing at least two compartments, a cathode, an anode and a divider and passing a current through the second electrochemical cell whereby the organic hydroxide is purified; and recovering the organic hydroxide from the second electrochemical cell.
    Type: Grant
    Filed: March 11, 1997
    Date of Patent: June 8, 1999
    Assignee: Sachem, Inc.
    Inventors: Roger D. Moulton, Mark W. Hellums
  • Patent number: 5618436
    Abstract: A process for clarifying a metal allkyl reaction product comprising passing a first feed stream comprising metal alkyls, a first, substantially water-immiscible organic solvent, and solid contaminants through a first membrane filter, the first filter being substantially continuously vibrated when said feed stream is passing through and recovering from the first filter a first permeate substantially free of solid contaminants and a first concentrate containing solid contaminants.
    Type: Grant
    Filed: February 16, 1996
    Date of Patent: April 8, 1997
    Assignee: CONDEA Vista Company
    Inventors: L. Ben Decker, Mark W. Hellums, Mark M. Chavez
  • Patent number: 5352842
    Abstract: A process for clarifying an alkoxylated product mixture produced using a calcium-based catalyst wherein the product mixture is heated to a temperature of from about 80.degree. C. to about 175.degree. C. to produce a filtration feed, the filtration feed being passed through a filter medium comprising material possessing polar groups to produce a clarified filtrate, the filtration feed being passed through the filter medium within about 5 days of being prepared, the filtration feed being passed through the filter medium until the desired degree of clarification is obtained, the temperature of the clarified filtrate being less than about 30.degree. C. but above the pour point of the clarified filtrate.
    Type: Grant
    Filed: March 30, 1993
    Date of Patent: October 4, 1994
    Assignee: Vista Chemical Company
    Inventors: Upali Weerasooriya, Steve V. Orsak, Clint Osborne, John Lin, Mark W. Hellums, Linton LeCompte, David A. Riley