The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 01, 2011
Filed:
Apr. 17, 2009
Brett M. Showalter, Wheaton, IL (US);
Peter E. Reed, Plainfield, IL (US);
Manian Ramesh, Barrington, IL (US);
Joseph Paul Street, Friendswood, TX (US);
Kin-tai Chang, Sugar Land, TX (US);
Pious Kurian, Aurora, IL (US);
Brett M. Showalter, Wheaton, IL (US);
Peter E. Reed, Plainfield, IL (US);
Manian Ramesh, Barrington, IL (US);
Joseph Paul Street, Friendswood, TX (US);
Kin-Tai Chang, Sugar Land, TX (US);
Pious Kurian, Aurora, IL (US);
Nalco Company, Naperville, IL (US);
Abstract
This invention is directed to a composition comprising encapsulated expandable polymeric microparticles including expandable base microparticles encapsulated in a shell of at least one layer of a labile or degradable encapsulation material. The encapsulated microparticles have an unexpanded volume average particle size diameter of from about 0.05 to about 5,000 microns. The invention is further directed to the use of the composition for modifying the permeability of subterranean formations and increasing the mobilization and/or recovery rate of hydrocarbon fluids present in the formations.