Patents by Inventor Frank-Michael Schnepel

Frank-Michael Schnepel 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).

  • Process for recovering oil from subterranean formations
    Patent number: 4589489
    Abstract: Disclosed is a method of using polymer flooding solutions in tertiary oil recovery operations in which the loss of relatively high molecular weight polymers to the formation is substantially reduced by the use of aqueous solutions of polyethylene glycol or polypropylene glycol or both, having a molecular weight of from about 600 to about 1200. The method is particularly effective under high salinity conditions.
    Type: Grant
    Filed: November 19, 1984
    Date of Patent: May 20, 1986
    Inventors: Hartwig Volz, Frank-Michael Schnepel