Patents by Inventor Shobha B. Parekh

Shobha B. Parekh 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