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:
Feb. 15, 2000
Filed:
Jun. 25, 1998
Applicant:
Inventors:
Gregor Keilhofer, Tacherting, DE;
Johann Plank, Trostberg, DE;
Assignee:
SKW Trostberg Aktiengesellschaft, Trostberg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; C01B / ;
U.S. Cl.
CPC ...
507140 ; 507904 ; 252184 ;
Abstract
A solids composition based on clay minerals and consisting of a) 40-99.8 wt. % of a clay mineral with a reduced moisture content of .ltoreq.7 wt. %, b) 0.01-30 wt. % of a mixed metal hydroxide and c) 0.01-30 wt. % of a solid base, and if necessary other additives, is described. The solids composition of the invention is an easy-to-use thickening agent for water-based drilling fluids, and has a long-term stability of at least three months.