Patents by Inventor John B. Siemak

John B. Siemak 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).

  • Scrubber scale prevention
    Patent number: 4216087
    Abstract: The present invention concerns a method of inhibiting or controlling calcium scale deposition in SO.sub.2 flue gas scrubbers which comprises scrubbing said flue gases with an aqueous composition comprising concentrated sodium hydroxide and a 2-hydroxyethyl iminodiacetate calcium inhibitor.
    Type: Grant
    Filed: December 18, 1978
    Date of Patent: August 5, 1980
    Assignee: The Dow Chemical Company
    Inventors: Ray S. Long, John B. Siemak