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:
Jun. 01, 1982
Filed:
Nov. 13, 1980
Applicant:
Inventors:
Richard G Gandy, Grand Prairie, TX (US);
Garry L Briggs, Edmonton, CA;
Assignee:
BJ-Hughes Inc., Houston, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
106 87 ; 106 93 ; 106 98 ; 106314 ;
Abstract
An expansive admixture is shown of the type used in cementing oil and gas well bores. Aluminum particles are coated with a gasoline and water insoluble wood resin. The resin coated aluminum particles in combination with activated charcoal and a fluid loss additive provide controlled expansion of the slurry over an extended period of time without detracting from other desirable properties of the slurry.