Patents by Inventor Wayne H. Lee

Wayne H. Lee 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 of separating and recovering phosphorus from phosphorus sludge
    Patent number: 5002745
    Abstract: A process is described for the separation and recovery of phosphorus from phosphorus-dirt mixtures by adding a quaternary ammonium compound to the mixture, while it is under an aqueous cover, agitating same, and separating a lower phosphorus phase from an upper dirt phase. The mixtures are treated prior to addition of the quaternary ammonium compound, where required, by lowering their dirt to phosphorus levels sufficiently low to permit them to be destabilized.
    Type: Grant
    Filed: May 7, 1990
    Date of Patent: March 26, 1991
    Assignee: FMC Corporation
    Inventors: Alan S. Michaels, Wayne H. Lee, Theodore F. Munday