Patents by Inventor Clarence W. Huffman

Clarence W. Huffman 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 alkyl substituted o-hydroxybenzoic acid esters
    Patent number: 4036873
    Abstract: A process for producing C.sub.1 -C.sub.5 alkyl substituted o-hydroxybenzoic acid esters comprising forming an anhydrous alkali metal phenolate-organic carrier mixture, carboxylating the phenolate by contacting the mixture with CO.sub.2 and reacting the resultant dialkali metal salt with 1 equivalent of an anhydrous acid/mole of salt and at least 1 mole of C.sub.1 -C.sub.5 alkyl chloride per mole of salt.
    Type: Grant
    Filed: March 7, 1975
    Date of Patent: July 19, 1977
    Assignee: IMC Chemical Group, Inc.
    Inventor: Clarence W. Huffman