Patents by Inventor Dewey W. Fuller, Jr.

Dewey W. Fuller, Jr. 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).

  • Purification of carboxyl streams
    Patent number: 5399752
    Abstract: Disclosed is a process for the purification of carboxyl streams such as product streams comprising one or more carboxyl compounds selected from carboxylic acids, carboxylic anhydrides and alkylidene dicarboxylates. The process provides a means for the reduction of the iodine content of carboxyl compound product streams which are contaminated with one or more iodine compounds.
    Type: Grant
    Filed: May 31, 1994
    Date of Patent: March 21, 1995
    Assignee: Eastman Chemical Company
    Inventors: Stanley J. Okrasinski, Regina M. Moncier, Patricia N. Mercer, Dewey W. Fuller, Jr., Steven L. Cook
  • Process for preparing phenylterephthalic acid
    Patent number: 5359134
    Abstract: Provided is a facile three step process for preparing 2-phenylterephthalic acid starting with p-xylene, followed by alkylation, dehydrogenation, and oxidation of the methyl groups corresponding to the origional p-xylene. The product, 2-phenylterephthalic acid, is useful as an intermediate in the synthesis of polyesters comprised of residues of 2-phenylterephthalic acid.
    Type: Grant
    Filed: August 14, 1992
    Date of Patent: October 25, 1994
    Assignee: Eastman Chemical Company
    Inventors: Bruce L. Gustafson, Charles E. Sumner, Jr., Michael Bellas, Gether Irick, Jr., Dewey W. Fuller, Jr., Ernest W. Arnold, Eric J. Fugate
  • Process for preparing 2,5-diphenylterephthalic acid by oxidation
    Patent number: 5334754
    Abstract: Provided is a process for preparing 2,5-diphenylterephthalic acid, which is useful in preparing certain polyesters, especially liquid-crystalline polyesters. In this process, p-xylene is di-alkylated with cyclohexene to provide 2,5-dicyclo-hexyl-p-xylene, which is in turn dehydrogenated to provide 2,5-diphenylxylene. 2,5-Diphenylxylene is then oxidized to provide 2,5-diphenylterephthalic acid by utilization of a cobaltous/manganous/bromide oxidation system.
    Type: Grant
    Filed: August 14, 1992
    Date of Patent: August 2, 1994
    Assignee: Eastman Chemical Company
    Inventors: Charles E. Sumner, Jr., Bruce L. Gustafson, Ernest W. Arnold, III, Eric J. Fugate, Dewey W. Fuller, Jr.
  • Process for the preparation of 2-(1-phenylethyl)hydroquinone and 2-(1-phenylethyl)hydroquinone diacetate
    Patent number: 5235116
    Abstract: Provided is an improved process for preparing 2-(1-phenylethyl)hydroquinone and its diacetate salt. In this process, the differential solubility of product and starting materials hydroquinone and styrene in non-polar organic solvents is utilized to provide mono-alkylated materials which can be easily removed from the reaction mixture. A solid acid catalyst is also used which allows the isolation of product and recycle of unreacted starting materials to be accomplished on an industrial-scale continuous process.
    Type: Grant
    Filed: August 24, 1992
    Date of Patent: August 10, 1993
    Assignee: Eastman Kodak Company
    Inventor: Dewey W. Fuller, Jr.
  • Process for the preparation of phenylhydroquinone
    Patent number: 5210330
    Abstract: Disclosed is an improved process for the preparation of phenylhydroquinone wherein hydroquinone is first alkylated with cyclohexene to produce cyclohexylhydroquinone which is then dehydrogenated to obtain phenylhydroquinone. The improvement comprises carrying out both the alkylation and dehydrogenation reactions in the presence of a solvent comprising diphenyl ether, biphenyl or a mixture thereof. The solvent possesses selective solubility for hydroquinone and cyclohexylhydroquinone which permits the separation of unreacted hydroquinone from the alkylation reaction product. The boiling point of the solvent also permits the dehydrogenation reaction to be performed at substantially atmospheric pressure.
    Type: Grant
    Filed: August 22, 1991
    Date of Patent: May 11, 1993
    Assignee: Eastman Kodak Company
    Inventors: Dewey W. Fuller, Jr, Bruce L. Gustafson, Bobby L. Bernard
  • Process for preparing cyclohexenylhydroquinone
    Patent number: 5177245
    Abstract: Provided is a process for preparing optionally-substituted cyclohexenylhydroquinones starting from cyclohexanone.
    Type: Grant
    Filed: November 25, 1991
    Date of Patent: January 5, 1993
    Assignee: Eastman Kodak Company
    Inventors: Dewey W. Fuller, Jr., Gether Irick, Jr.