Patents by Inventor Jan D. Dozier

Jan D. Dozier 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).

  • Reciprocating pump with partial flow reversal
    Patent number: 4565246
    Abstract: A reciprocating type oil well pump. It employs modifications of standard pump structure in order to obtain a reverse flow pulse during each pumping cycle. The pump barrel has a port near the upper end of the stroke, and the traveling valve is spring loaded against a desired pressure. The piston closes the port during the lower portion of the stroke.
    Type: Grant
    Filed: December 19, 1983
    Date of Patent: January 21, 1986
    Assignee: Texaco, Inc.
    Inventors: Terry L. Frazier, Jan D. Dozier