Patents by Inventor Gilda Maria Lizarraga

Gilda Maria Lizarraga 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).

Addition of zwitterionic surfactant to water soluble polymer to increase the stability of the polymers in aqueous solutions containing salt and/or surfactants

Patent number: 9428684

Abstract: An aqueous fluid composition useful for the recovery of hydrocarbons from a subterranean formation, including a mixture of water, a water soluble polymer, an inorganic salt and at least one zwitterionic surfactant and methods of using same.

Type: Grant

Filed: October 17, 2008

Date of Patent: August 30, 2016

Assignee: RHODIA OPERATION

Inventors: Lawrence Alan Hough, Gilda Maria Lizarraga, Herve Adam, Jean-Christophe Castaing, Subramanian Kesavan
Addition of nonionic surfactants to water soluble block copolymers to increase the stability of the copolymer in aqueous solutions containing salt and/or surfactants

Patent number: 7789160

Abstract: An aqueous fluid useful for the recovery of crude oil from a subterranean formation, which includes a composition including a mixture of water, a water soluble block copolymer, an inorganic salt and at least one member of the group of a nonionic surfactant having an HLB of less than 12, and methods for using same.

Type: Grant

Filed: October 17, 2008

Date of Patent: September 7, 2010

Assignee: Rhodia Inc.

Inventors: Lawrence Alan Hough, Gilda Maria Lizarraga, Herve Adam, Jean-Christophe Castaing, Subramanian Kesavan
ADDITION OF ZWITTERIONIC SURFACTANT TO WATER SOLUBLE POLYMER TO INCREASE THE STABILITY OF THE POLYMERS IN AQUEOUS SOLUTIONS CONTAINING SALT AND/OR SURFACTANTS

Publication number: 20090111716

Abstract: An aqueous fluid composition useful for the recovery of hydrocarbons from a subterranean formation, including a mixture of water, a water soluble polymer, an inorganic salt and at least one zwitterionic surfactant and methods of using same.

Type: Application

Filed: October 17, 2008

Publication date: April 30, 2009

Applicant: Rhodia Inc.

Inventors: Lawrence Alan HOUGH, Gilda Maria Lizarraga, Herve Adam, Jean-Christophe Castaing, Subramanian Kesavan
ADDITION OF NONIONIC SURFACTANTS TO WATER SOLUBLE BLOCK COPOLYMERS TO INCREASE THE STABILITY OF THE COPOLYMER IN AQUEOUS SOLUTIONS CONTAINING SALT AND/OR SURFACTANTS

Publication number: 20090107681

Abstract: An aqueous fluid useful for the recovery of crude oil from a subterranean formation, which includes a composition including a mixture of water, a water soluble block copolymer, an inorganic salt and at least one member of the group of a nonionic surfactant having an HLB of less than 12, and methods for using same.

Type: Application

Filed: October 17, 2008

Publication date: April 30, 2009

Applicant: Rhodia Inc.

Inventors: Lawrence Alan HOUGH, Gilda Maria Lizarraga, Herve Adam, Jean-Christophe Castaing, Subramanian Kesavan

Addition of zwitterionic surfactant to water soluble polymer to increase the stability of the polymers in aqueous solutions containing salt and/or surfactants

Addition of nonionic surfactants to water soluble block copolymers to increase the stability of the copolymer in aqueous solutions containing salt and/or surfactants

ADDITION OF ZWITTERIONIC SURFACTANT TO WATER SOLUBLE POLYMER TO INCREASE THE STABILITY OF THE POLYMERS IN AQUEOUS SOLUTIONS CONTAINING SALT AND/OR SURFACTANTS

ADDITION OF NONIONIC SURFACTANTS TO WATER SOLUBLE BLOCK COPOLYMERS TO INCREASE THE STABILITY OF THE COPOLYMER IN AQUEOUS SOLUTIONS CONTAINING SALT AND/OR SURFACTANTS