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:
Apr. 19, 1977
Filed:
Nov. 07, 1974
Applicant:
Inventor:
Harry L Chang, Dallas, TX (US);
Assignee:
Mobil Oil Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166273 ; 166252 ;
Abstract
Waterflooding employing the use of an initial mobility control slug which is graded at its front end by progressively increasing its viscosity and a terminal mobility control slug which is graded at its back end by progressively decreasing its viscosity. An intermediate mobility control slug of substantially constant viscosity may be injected between the initial and terminal slugs. The invention may be carried out in conjunction with surfactant or alkaline waterflooding.
Chang, Harry. (1977). Oil recovery by waterflooding with improved mobility control (U.S. Patent No. 4018281). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4018281
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile