Patents by Inventor Doug B. Dewitt-Dick

Doug B. Dewitt-Dick 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).

  • Control of scale in flue gas scrubbers
    Patent number: 4670236
    Abstract: A method for minimizing calcium scale deposits in wet slurry flue gas desulfurization systems by introducing into the slurry a 50:50 diisobutylene-maleic anhydride copolymer of an average molecular weight of 11000.
    Type: Grant
    Filed: January 27, 1986
    Date of Patent: June 2, 1987
    Assignee: Drew Chemical Corporation
    Inventors: Peter A. Thomas, Doug B. Dewitt-Dick