Patents by Inventor J. Deven Cleckler

J. Deven Cleckler 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).

  • Recycling polyethylene naphthalate containing materials in a process to produce diesters
    Patent number: 7247742
    Abstract: A process for preparing a dialkylester of a naphthalenedicarboxylic acid comprising directing a liquid phase reaction mixture comprising a low molecular weight alcohol, a naphthalenedicarboxylic acid, a dialkylester of a naphthalenedicarboxylic acid, and a polyethylene naphthalate containing material, at a given temperature and pressure through series arranged reaction zones and subsequently removing a product comprising a dialkylester formed by the reaction of the naphthalenedicarboxylic acid and the polyethylene naphthalate containing material with the low molecular weight alcohol from a reaction zone. This invention is also directed to a process for preparing a purified dialkylester of a naphthalenedicarboxylic acid comprising a series of crystallization and distillation steps, and combinations thereof.
    Type: Grant
    Filed: May 20, 2004
    Date of Patent: July 24, 2007
    Assignee: BP Corporation North America Inc.
    Inventors: Rosemary F. McMahon, John A. Macek, Gregory P. Hussmann, Michael J. Panzer, Raymond J. Eifert, David A. Young, Allen B. Mossman, J. Deven Cleckler