Patents by Inventor James M. Butterwick

James M. Butterwick 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).

  • Method of producing alkyl sulfoacetate compositions
    Patent number: 5616782
    Abstract: Disclosed are alkyl sulfoacetate compositions comprising a sulfonated ester of the formula:RO(CH.sub.2 CHR.sub.1 O).sub.n COCH.sub.2 SO.sub.3 MwhereR represents straight chain alkyl having from about 6 to 20 carbon atoms;R.sub.1 is hydrogen, methyl, or ethyl;n is 0, or an integer of from 1 to 20; andM represents a cation;the composition being substantially free from monochloroacetate salts and monochloroacetic acid. These compositions are prepared by reacting an alkyl chloroester of the formula RO(CH.sub.2 CHR.sub.1 O).sub.n COCH.sub.2 Cl where R, R.sub.1 and n are as defined above with an excess of sodium sulfite in the presence of a sulfitation catalyst at a temperature of at least about 75.degree. C. Also disclosed are oral care compositions comprising these surfactant compositions.
    Type: Grant
    Filed: November 16, 1995
    Date of Patent: April 1, 1997
    Assignee: Stepan Company
    Inventors: Ralph Thompson, Ned M. Rockwell, Ann M. Michels, William R. Mohring, Kevin C. Kolbe, J. Duke Seibold, James M. Butterwick