Patents by Inventor David W. Lerch

David W. Lerch 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).

  • Moving belt-type oil skimmer with propulsion induced flow, method and apparatus
    Patent number: 3992292
    Abstract: An oil spill recovery method and apparatus utilizing a low-resistance flow-through endless belt of reticular oleophilic, hydrophobic material and forced flow of water with oil through the belt through induction effected by propulsion means operating at a position immediately behind and beneath the submerged active portion of the belt.
    Type: Grant
    Filed: October 15, 1974
    Date of Patent: November 16, 1976
    Assignee: Marine Construction & Design Co.
    Inventors: Eldon L. Grimes, David W. Lerch