Patents by Inventor John C. Carr

John C. Carr 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).

  • Removal of dissolved disodium terephthalate from aqueous solution also containing sodium hydroxide
    Patent number: 4215224
    Abstract: This invention relates to the removal of substantially all of the disodium terephthalate (Na.sub.2 TA) dissolved in a dilute aqueous solution of sodium hydroxide. More particularly this invention pertains to the recovery for reuse of an aqueous solution containing 5 weight percent sodium hydroxide from an aqueous solution containing, on a weight basis, from 5 to 5.25 percent Na.sub.2 TA and 2.5 to 3.0 percent sodium hydroxide.
    Type: Grant
    Filed: December 11, 1978
    Date of Patent: July 29, 1980
    Assignee: Standard Oil Company (Indiana)
    Inventors: Franklin D. Wallace, John C. Carr