Patents by Inventor Donald D. Moerdyke

Donald D. Moerdyke 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).

  • Single pass continuous urea-sulfuric acid process
    Patent number: 4962283
    Abstract: Urea and sulfuric acid are reacted in an air-water spray in cocurrent heat exchange therewith to produce concentrated urea-sulfuric acid solutions.
    Type: Grant
    Filed: February 28, 1989
    Date of Patent: October 9, 1990
    Assignee: Union Oil Company of California
    Inventors: Bruce A. Harbolt, Donald D. Moerdyke