Patents by Inventor Mabel Chen

Mabel Chen 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).

  • Removal of alkyl alkanesulfonate esters from alkanesulfonic acids and other organic media
    Patent number: 7297813
    Abstract: Methods of removing alkyl alkanesulfonate esters from aqueous or anhydrous compositions are provided. The invention provides methods for the conversion of alkyl alkanesulfonate esters of the formula RSO3R? to the corresponding acids of the formula RSO3H. The alkyl alkanesulfonate esters are present in an organic medium, which may contain significant amounts of water or which may be anhydrous or substantially anhydrous. In some embodiments, the invention provides methods for purifying aqueous or anhydrous alkanesulfonic acids by removing alkyl alkanesulfonate esters.
    Type: Grant
    Filed: August 5, 2004
    Date of Patent: November 20, 2007
    Assignee: Arkema Inc.
    Inventors: Gary Smith, Robert Cordova, Johnson C. H. Chen, Mabel Chen
  • Removal of alkyl alkanesulfonate esters from alkanesulfonic acids and other organic media
    Publication number: 20060030725
    Abstract: Methods of removing alkyl alkanesulfonate esters from aqueous or anhydrous compositions are provided. The invention provides methods for the conversion of alkyl alkanesulfonate esters of the formula RSO3R? to the corresponding acids of the formula RSO3H. The alkyl alkanesulfonate esters are present in an organic medium, which may contain significant amounts of water or which may be anhydrous or substantially anhydrous. In some embodiments, the invention provides methods for purifying aqueous or anhydrous alkanesulfonic acids by removing alkyl alkanesulfonate esters.
    Type: Application
    Filed: August 5, 2004
    Publication date: February 9, 2006
    Inventors: Gary Smith, Robert Cordova, Johnson Chen, Mabel Chen