Patents by Inventor Thomas E. Guralski

Thomas E. Guralski 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).

  • Isolation of cis-isomers from isomeric mixtures of cis/transcyclopropanecarboxylates
    Patent number: 5047581
    Abstract: The treatment of isomeric mixtures of cis/trans -3-(2,2-dihalo-3,3,3-trifluoropropyl)-2,2-dimethylcyclopropanecarboxylic acid esters with excess base at elevated temperatures hydrolyzes the ester, dehydrohalogenates the side chain, and thereafter selectively converts the resulting unsaturated side chain of the corresponding trans-cyclopropanecarboxylic acid to an acetyl byproduct, from which may be readily separated and recovered an enriched concentration of the desired cis-2-halo-1-propenylcyclopropanecarboxylic acid, together with minor amounts of the corresponding transacid.
    Type: Grant
    Filed: August 25, 1989
    Date of Patent: September 10, 1991
    Assignee: FMC Corporation
    Inventors: Raymond M. Palmere, Thomas E. Guralski