Patents by Inventor David R. Marr, Jr.

David R. Marr, Jr. 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).

  • Roof bolt plate
    Patent number: 7597505
    Abstract: A support member for supporting a roof of a subsurface space. The support member may include a base portion for defining a surface area to contact a ceiling of the subsurface space. One or more sockets may extend from the base for defining openings for receiving roof bolts therethrough. Accordingly, the support member may be configured to function as a washer for the roof bolts to support the roof material above the ceiling. The sockets may include covers for preventing the roof bolts from extending out of the sockets. The sockets may be oriented at angles with respect to the base such that when roof bolts are placed in the sockets, the roof bolts may extend at angles with respect to each other in a splayed configuration.
    Type: Grant
    Filed: March 28, 2006
    Date of Patent: October 6, 2009
    Inventors: Herbert S. Price, David R. Marr, Jr.
  • Method for supporting a subsurface material
    Patent number: 7510351
    Abstract: A support member for supporting a roof of a subsurface space. The support member may include a base portion for defining a surface area to contact a ceiling of the subsurface space. One or more sockets may extend from the base for defining openings for receiving roof bolts therethrough. Accordingly, the support member may be configured to function as a washer for the roof bolts to support the roof material above the ceiling. The sockets may include covers for preventing the roof bolts from extending out of the sockets. The sockets may be oriented at angles with respect to the base such that when roof bolts are placed in the sockets, the roof bolts may extend at angles with respect to each other in a splayed configuration.
    Type: Grant
    Filed: March 28, 2006
    Date of Patent: March 31, 2009
    Inventors: Herbert S. Price, David R. Marr, Jr.
  • Liquid well stimulator
    Patent number: 7293608
    Abstract: A stimulator device and associated method is provided for a subterranean liquid well comprising a pump adapted for selectively evacuating vapor from the borehole of the well above a liquid column in the borehole to opposingly impinge the liquid column to hydrostatically agitate a subterranean formation from which the liquid originates.
    Type: Grant
    Filed: December 10, 2004
    Date of Patent: November 13, 2007
    Inventors: Clifton M. Dudley, David R. Marr, Jr.