Patents by Inventor Carl R. Dupre

Carl R. Dupre 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).

  • Method and integrated process for the carboxylation of furan derived carboxylic acids to 2,5-furandicarboxylic acid
    Patent number: 11708343
    Abstract: A process for carboxylation of a furoate slurry to produce FDCA, especially 2,5-FDCA, includes the steps of: feeding a slurry containing a suspension fluid, furoate, a surfactant and an alkali metal carbonate to a carboxylation reactor; and feeding a flow of CO2 to the carboxylation reactor at flow conditions sufficient to suspend the slurry in the reactor and react the furoate with CO2 to form 2,5-FDCA. A fully integrated process is also disclosed.
    Type: Grant
    Filed: July 16, 2021
    Date of Patent: July 25, 2023
    Assignee: KSE, Inc.
    Inventors: James R. Kittrell, Carl R. Dupre, Keith D. Kittrell, Leonard T. McDonald, Jeffrey A. Kittrell
  • METHOD AND INTEGRATED PROCESS FOR THE CARBOXYLATION OF FURAN DERIVED CARBOXYLIC ACIDS TO 2,5-FURANDICARBOXYLIC ACID
    Publication number: 20230020051
    Abstract: A process for carboxylation of a furoate slurry to produce FDCA, especially 2,5-FDCA, includes the steps of: feeding a slurry containing a suspension fluid, furoate, a surfactant and an alkali metal carbonate to a carboxylation reactor; and feeding a flow of CO2 to the carboxylation reactor at flow conditions sufficient to suspend the slurry in the reactor and react the furoate with CO2 to form 2,5-FDCA. A fully integrated process is also disclosed.
    Type: Application
    Filed: July 16, 2021
    Publication date: January 19, 2023
    Applicant: KSE, Inc.
    Inventors: James R. Kittrell, Carl R. Dupre, Keith D. Kittrell, Leonard T. McDonald, Jeffrey A. Kittrell
  • Process for preparing polymeric polyblends having a rubber phase as particles with a bimodal particle size distribution
    Patent number: 4334039
    Abstract: This invention relates to a method for preparing improved monoalkenyl aromatic polyblends having a dispersed rubber phase as rubber particles having a bimodal particle size distribution and compositions thereof.
    Type: Grant
    Filed: March 23, 1981
    Date of Patent: June 8, 1982
    Assignee: Monsanto Company
    Inventor: Carl R. Dupre
  • Method for preparing a monoalkenyl aromatic polyblend having a dispersed rubber phase as particles with a bimodal particle size distribution
    Patent number: 4146589
    Abstract: This invention relates to a method for preparing improved monoalkenyl aromatic polyblends having a dispersed rubber phase as rubber particles having a bimodal particle size distribution and compositions thereof.
    Type: Grant
    Filed: May 19, 1978
    Date of Patent: March 27, 1979
    Assignee: Monsanto Company
    Inventor: Carl R. Dupre