Patents by Inventor Donald J. Weintritt

Donald J. Weintritt 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).

  • Patent number: 7666469
    Abstract: An coated particulate is provided with a graphite-impregnated resin coating. The oil field particulates may comprise any of gravel-pack sand, granular betonite, ground Gilsonite, calcium carbonate, glass beads, rock wool, shredded paper, metal spheres, ceramic beads, nut hulls, ground rubber, plastic beads, muscovite mica, calcined petroleum coke, and perlite. The resin may comprise as a binder one or more of a natural, synthetic, water-soluble, and organic resins. More specifically, the resins may comprise an organic film-forming resin such as an alkyd, polyurethane and epoxy. Alternatively, the resin may comprise a film-forming water-soluble polymer, such as a starch, carboxymethyl cellulose, hydroxyethyl cellulose, and xanthan gum. In a further alternative, the resin may comprise a resin-dispersed emulsion, such as a latex or acrylic.
    Type: Grant
    Filed: June 20, 2008
    Date of Patent: February 23, 2010
    Assignee: Superior Graphite Co.
    Inventors: Donald J. Weintritt, Peter Zaleski, Henry Francois, Frank A. Wawrzos
  • Publication number: 20090075847
    Abstract: A method for increasing drilling rates by reducing torque and drag in hostile environments such as high pressure, high temperature, and horizontal wells is provided by adding chemically and thermally inert spherical carbon beads to the drilling fluid.
    Type: Application
    Filed: December 17, 2007
    Publication date: March 19, 2009
    Inventors: Frank A. Wawrzos, Donald J. Weintritt
  • Publication number: 20080248308
    Abstract: An coated particulate is provided with a graphite-impregnated resin coating. The oil field particulates may comprise any of gravel-pack sand, granular betonite, ground Gilsonite, calcium carbonate, glass beads, rock wool, shredded paper, metal spheres, ceramic beads, nut hulls, ground rubber, plastic beads, muscovite mica, calcined petroleum coke, and perlite. The resin may comprise as a binder one or more of a natural, synthetic, water-soluble, and organic resins. More specifically, the resins may comprise an organic film-forming resin such as an alkyd, polyurethane and epoxy. Alternatively, the resin may comprise a film-forming water-soluble polymer, such as a starch, carboxymethyl cellulose, hydroxyethyl cellulose, and xanthan gum. In a further alternative, the resin may comprise a resin-dispersed emulsion, such as a latex or acrylic.
    Type: Application
    Filed: June 20, 2008
    Publication date: October 9, 2008
    Inventors: Donald J. Weintritt, Peter Zaleski, Francois Henry, Frank A. Wawrzos
  • Patent number: 7402338
    Abstract: An coated particulate is provided with a graphite-impregnated resin coating. The oil field particulates may comprise any of gravel-pack sand, granular betonite, ground Gilsonite, calcium carbonate, glass beads, rock wool, shredded paper, metal spheres, ceramic beads, nut hulls, ground rubber, plastic beads, muscovite mica, calcined petroleum coke, and perlite. The resin may comprise as a binder one or more of a natural, synthetic, water-soluble, and organic resins. More specifically, the resins may comprise an organic film-forming resin such as an alkyd, polyurethane and epoxy. Alternatively, the resin may comprise a film-forming water-soluble polymer, such as a starch, carboxymethyl cellulose, hydroxyethyl cellulose, and xanthan gum. In a further alternative, the resin may comprise a resin-dispersed emulsion, such as a latex or acrylic.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: July 22, 2008
    Assignee: Superior Graphite Co.
    Inventors: Donald J. Weintritt, Peter Zaleski, Henry Francois, Frank A. Wawrzos
  • Patent number: 5826669
    Abstract: A method of preventing or controlling the loss of well drilling fluid into the pores and fractures of subterranean rock formations by the addition of resilient graphitic carbon particles to the drilling fluid in sufficient amounts to plug the pores and fractures. The graphitic carbon material reduces loss of circulation, lowers torque and drag, prevents casing wear while drilling, and provides a new method for the controlled release of graphite at extreme pressure. The material is non-toxic and imparts the well-known lubricating properties of graphite without contributing to surface sheen development under US EPA offshore cuttings discharge rules.
    Type: Grant
    Filed: December 10, 1996
    Date of Patent: October 27, 1998
    Assignee: Superior Graphite Co.
    Inventors: Peter L. Zaleski, David J. Derwin, Donald J. Weintritt, George W. Russell
  • Patent number: 5183943
    Abstract: A process for improving the catalytic activity of a partially deactivated solubilized rhodium - tertiary organophosphine complex hydroformylation catalyst.
    Type: Grant
    Filed: March 18, 1991
    Date of Patent: February 2, 1993
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: David R. Bryant, James E. Babin, James C. Nicholson, Donald J. Weintritt, Jr.
  • Patent number: 3953573
    Abstract: Minute amounts of boron present in naturally occurring brines found in oceans, inland seas, salt lakes and the like are removed by treating the brine with a solid, finely divided lignite.
    Type: Grant
    Filed: February 21, 1975
    Date of Patent: April 27, 1976
    Assignee: N L Industries, Inc.
    Inventors: Edward O. Kazimir, Donald J. Weintritt