Patents by Inventor Walter L. Clingman

Walter L. Clingman 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).

  • Hot water flood
    Patent number: 4057106
    Abstract: An apparatus for injecting hot water into an oil well head to facilitate recovery of residual oil deposits.
    Type: Grant
    Filed: July 12, 1976
    Date of Patent: November 8, 1977
    Inventor: Walter L. Clingman