Patents by Inventor Charles G. Ashe

Charles G. Ashe 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 preparing low malodor dimethyl sulfoxide
    Publication number: 20090005601
    Abstract: The disclosed process relates to the removal of malodorous compounds from dimethyl sulfoxide.
    Type: Application
    Filed: September 17, 2007
    Publication date: January 1, 2009
    Inventors: George Kvakovszky, David Villarrubia, II, Scott Stevenson, Charles G. Ashe
  • Process and apparatus for making ultra-pure DMSO
    Patent number: 6414194
    Abstract: One aspect of this invention relates to processes for solidifying dimethylsufoxide including the steps of partially solidifying a liquid phase including dimethylsulfoxide and one or more impurities, to form a mixture comprising solid dimethylsulfoxide and a liquid residue, and substantially separating the solid dimethylsulfoxide from the liquid residue, wherein the liquid residue comprises liquid dimethylsulfoxide and at least a portion of the impurities, and wherein the liquid residue is not subsequently treated by any step of partial solidification. In certain embodiments of the processes of the invention, ultra-high purity DMSO that exceeds the purity specifications for U.S.P. grade DMSO can be produced by employing solidification, fractional solidification and/or melt crystallization processes.
    Type: Grant
    Filed: April 24, 2000
    Date of Patent: July 2, 2002
    Assignee: Gaylord Chemical Corporation
    Inventors: Claude A. Bloom, Jr., Charles G. Ashe, John L. Ferguson, Joe P. Gibbons, Jr., Kenneth W. Otto, Alan M. Rodger