Patents by Inventor Ted S. Hallen

Ted S. Hallen 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).

  • Synthesis of hydroxy sulfonic acids
    Patent number: 4987250
    Abstract: Hydroxy sulfonic acids in general and isethionic acid (2-hydroxy ethyl sulfonic acid) in particular can be prepared at 99+% purity and good yields by the selective oxidation of a precursor hydroxy mercaptan with hydrogen peroxide. The resulting product is pure enough to be used directly in the synthesis of sulfo-acrylic esters which are finding considerable use as stabilizers in producing vinylidene chloride copolymers used for FDA approved packaging films.
    Type: Grant
    Filed: January 19, 1989
    Date of Patent: January 22, 1991
    Assignee: Union Oil Company of California
    Inventors: Dennis E. McGee, Ted S. Hallen
  • Synthesis of sulfonic acids and carboxylic acid ester derivatives thereof
    Patent number: 4910330
    Abstract: Hydroxy sulfonic acids in general and isethionic acid (2-hydroxy ethyl sulfonic acid) in particular can be prepared at 99+% purity and good yields by the selective oxidation of a precursor hydroxy mercaptan with hydrogen peroxide. The resulting product is pure enough to be used directly in the synthesis of sulfo-acrylic esters which are finding considerable use as stabilizers in producing vinylidene chloride copolymers used for FDA approved packaging films.
    Type: Grant
    Filed: September 25, 1987
    Date of Patent: March 20, 1990
    Assignee: Union Oil Company of California
    Inventors: Dennis E. McGee, Ted S. Hallen