Patents by Inventor B. Franklin Gupton

B. Franklin Gupton 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).

  • Conversion of pyridine-2,3-dicarboxylic acid esters to cyclic anhydrides
    Patent number: 5208342
    Abstract: In one embodiment this invention provides a process for converting a pyridine-2,3-dicarboxylic acid diester to the corresponding cyclic anhydride directly, without any recovery and purification of the pyridine-2,3-dicarboxylic acid intermediate.An important aspect of the invention process is the utility of pure pyridine-2,3-dicarboxylic acid diester starting matter. A procedure for providing pure diester starting material is demonstrated.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: May 4, 1993
    Assignee: Hoechst Celanese Corporation
    Inventors: B. Franklin Gupton, John Saukaitis
  • Process for preparing pyridine carboxylic acid esters
    Patent number: 5047542
    Abstract: A novel method is disclosed for the preparation of 2,3-pyridine-dicarboxylates by the reaction of a ketoester such as dimethyl oxalacetate with an .alpha.,.beta.-unsaturated aldehyde or ketone such as 2-ethylacrolein and at least 1 molar equivalent of ammonium salt in suitable solvent.
    Type: Grant
    Filed: July 1, 1988
    Date of Patent: September 10, 1991
    Assignee: Hoechst Celanese Corporation
    Inventors: B. Franklin Gupton, James H. Rea, Werner H. Mueller, John Saukaitis
  • Preparation of sodium diethyl oxalacetate
    Patent number: 4902819
    Abstract: Sodium diethyl oxalacetate is prepared in a specific manner by adding sodium ethoxide to a mixture of diethyl oxalate and ethyl acetate to obtain a free flowing sodium salt which is easily separable and purified.
    Type: Grant
    Filed: September 22, 1988
    Date of Patent: February 20, 1990
    Assignee: Hoechst Celanese Corporation
    Inventors: B. Franklin Gupton, James H. Rae
  • Process for preparing pyridine carboxylic acid esters
    Patent number: 4871859
    Abstract: A novel method is disclosed for the preparation of 2,3-pyridine-dicarboxylates by the reaction of a ketoester such as dimethyl oxalacetate with an .alpha.,.beta.-unsaturated aldehyde or ketone such as 2-ethylacrolein and at least 1 molar equivalent of ammonium salt in suitable solvent utilizing a dehydrogenation catalyst such as palladium on carbon.
    Type: Grant
    Filed: March 2, 1988
    Date of Patent: October 3, 1989
    Assignee: Hoechst Celanese Corporation
    Inventors: B. Franklin Gupton, James H. Rea, Werner H. Mueller
  • Process for the production of 2,6-diisopropylnaphthalene dihydroperoxide
    Patent number: 4503262
    Abstract: A process is disclosed for the preparation of 2,6-dihydroisopropylnaphthalene, dihydroperoxide involving the oxidation of 2,6-diisopropylnaphthalene in the presence of a catalyst wherein the improvement comprises carrying out said oxidation in the presence of a C.sub.5 -C.sub.14 aliphatic hydrocarbon solvent.
    Type: Grant
    Filed: August 4, 1983
    Date of Patent: March 5, 1985
    Assignee: Virginia Chemicals, Inc.
    Inventors: B. Franklin Gupton, Edwin D. Little