Patents by Inventor Christian E. Spindler

Christian E. Spindler 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).

  • Cementing subterranean zones using cement compositions containing biodegradable dispersants
    Patent number: 6953090
    Abstract: Methods of cementing subterranean zones using cement compositions containing biogradable dispersants are provided. The methods are basically comprised of the steps of preparing a hydraulic cement, a biodegradable dispersant comprised of polyaspartic acid containing side chains formed by reacting one or more side chain chemicals with said polyaspartic acid and sufficient water to form a pumpable slurry, placing the cement composition into a zone to be cemented and allowing the cement composition to set into an impermeable solid mass therein.
    Type: Grant
    Filed: November 17, 2003
    Date of Patent: October 11, 2005
    Assignees: Halliburton Energy Services, Inc., Degussa Construction Polymers GmbH
    Inventors: Jan Pieter Vijn, Christian E. Spindler, Gregor Keilhofer, Johann Plank
  • Cementing subterranean zones using cement compositions containing biodegradable dispersants
    Publication number: 20040099416
    Abstract: Methods of cementing subterranean zones using cement compositions containing biogradable dispersants are provided. The methods are basically comprised of the steps of preparing a hydraulic cement, a biodegradable dispersant comprised of polyaspartic acid containing side chains formed by reacting one or more side chain chemicals with said polyaspartic acid and sufficient water to form a pumpable slurry, placing the cement composition into a zone to be cemented and allowing the cement composition to set into an impermeable solid mass therein.
    Type: Application
    Filed: November 17, 2003
    Publication date: May 27, 2004
    Inventors: Jan Pieter Vijn, Christian E. Spindler, Gregor Keilhofer, Johaan Plank
  • CEMENTING SUBTERRANEAN ZONES USING CEMENT COMPOSITIONS CONTAINING BIODEGRADABLE DISPERSANTS
    Publication number: 20030230407
    Abstract: Methods of cementing subterranean zones using cement compositions containing biodegradable dispersants are provided. The methods are basically comprised of the steps of preparing a hydraulic cement, a biodegradable dispersant comprised of polyaspartic acid containing side chains formed by reacting one or more side chain chemicals with said polyaspartic acid and sufficient water to form a pumpable slurry, placing the cement composition into a zone to be cemented and allowing the cement composition to set into an impermeable solid mass therein.
    Type: Application
    Filed: June 13, 2002
    Publication date: December 18, 2003
    Inventors: Jan Pieter Vijn, Christian E. Spindler, Gregor Keilhofer, Johann Plank