Patents by Inventor John M. Cassells

John M. Cassells 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).

  • Preparation of acylated sucrose derivatives
    Patent number: 5141860
    Abstract: Sucrose derivatives partially acylated in each ring can be obtained by treating a fully or partially acylated sucrose derivative with an enzyme having sucrose esterase activity capable of removing at least one acyl group from each ring, generally comprising or being a component of a lipase, esterase, amylase, .alpha.-galactosidase or protease preparation, the enzyme treatment being effected in an aqueous system. Sucralose can be obtained by using this method to obtain a sucrose 2,3,6,3',4'-penta ester which can then be chlorinated and de-esterfied. Some of the penta acetates, tetraacetates and mixed acetates/butyrates are new compounds.
    Type: Grant
    Filed: September 26, 1989
    Date of Patent: August 25, 1992
    Assignee: Tate & Lyle Public Limited Company
    Inventors: Stephen Bornemann, John M. Cassells, Clive L. Combes, Jonathan S. Dordik, Andrew J. Hacking