Patents by Inventor Mankin Chan

Mankin Chan 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 for fracturing of oil shale
    Patent number: 4522265
    Abstract: Oil shale, particularly shale having high organic content and/or shallow burial, is fractured by contact with an amino compound, exemplified by ammonia (NH.sub.3) and hydrazine (H.sub.2 NNH.sub.2).
    Type: Grant
    Filed: February 25, 1980
    Date of Patent: June 11, 1985
    Assignee: University of Southern California
    Inventors: Teh F. Yen, Mankin Chan
  • Pre-caustic flood treatment
    Patent number: 4325433
    Abstract: A process for the recovery of oil from a subteranean oil-bearing formation, in which the formation is potentiated to recovery by alkaline flooding by introducing an aqueous solution of acid selected from mineral acids and organic acids having less than 5 carbon atoms per molecule.
    Type: Grant
    Filed: June 27, 1980
    Date of Patent: April 20, 1982
    Assignee: University of Southern California
    Inventors: Teh Fu Yen, Mankin Chan