Patents by Inventor Stewart W. Krause

Stewart W. Krause 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).

  • Composition for use in sealing a porous subterranean formation, and methods of making and using
    Patent number: 6777377
    Abstract: A composition for sealing porous subterranean formations comprises a mixture of a water-swellable clay and a water insoluble, water absorbent, water-swellable polymer, wherein the mixture is coated with a material that is resistant to penetration by water. The water penetration resistant material helps the delay the onset of swelling of the clay and polymer until it reaches the formations intended for sealing. Mixing the clay with the water-swellable polymer prior to coating assists in coating of the water-swellable polymer with the water penetration resistant material. The coated mixture can be suspended in an aqueous liquid, and then pumped into a subterranean cavity to seal porous formations therein.
    Type: Grant
    Filed: December 3, 2002
    Date of Patent: August 17, 2004
    Assignee: Wyo-Ben, Inc.
    Inventors: Kent R. Myers, Richard K. Brown, Stewart W. Krause, Shobha B. Parekh, Robert W. Stichman
  • Composition for use in sealing a porous subterranean formation, and methods of making and using
    Publication number: 20030104949
    Abstract: A composition for sealing porous subterranean formations comprises a mixture of a water-swellable clay and a water insoluble, water absorbent, water-swellable polymer, wherein the mixture is coated with a material that is resistant to penetration by water. The water penetration resistant material helps the delay the onset of swelling of the clay and polymer until it reaches the formations intended for sealing. Mixing the clay with the water-swellable polymer prior to coating assists in coating of the water-swellable polymer with the water penetration resistant material. The coated mixture can be suspended in an aqueous liquid, and then pumped into a subterranean cavity to seal porous formations therein.
    Type: Application
    Filed: December 3, 2002
    Publication date: June 5, 2003
    Inventors: Kent R. Myers, Richard K. Brown, Stewart W. Krause, Shobha B. Parekh, Robert W. Stichman
  • Flexible grouting composition
    Patent number: 5512096
    Abstract: A grouting composition for sealing boreholes or other cavities comprising 90.0-99.99% water swellable clay and 0.01-10.0% gelling agent. The grouting composition is mixed with fresh water to provide an easily placed, low cost, low permeability sealing composition. A preferred grouting composition contains 98-99% sodium bentonite and 1-2% cement. In use 50 pounds of the preferred grouting composition is mixed with 27-38 gallons of fresh water to produce a grouting composition containing 13.7-18.2% solids and having a fluid density equal to or greater than 9.0 lbs/gallon with a Marsh funnel viscosity equal to or greater than 50 seconds.
    Type: Grant
    Filed: July 14, 1995
    Date of Patent: April 30, 1996
    Assignee: Wyo-Ben, Inc.
    Inventor: Stewart W. Krause