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:
Aug. 08, 2017
Filed:
Oct. 28, 2011
Stephen E. Amos, Minneapolis, MN (US);
Andrew S. D'souza, Shoreview, MN (US);
Clara E. Mata, Lindstrom, MN (US);
Stephen E. Amos, Minneapolis, MN (US);
Andrew S. D'Souza, Shoreview, MN (US);
Clara E. Mata, Lindstrom, MN (US);
3M INNOVATIVE PROPERTIES COMPANY, Saint Paul, MN (US);
Abstract
There is provided aqueous fluids comprising a mixture of at least two polysaccharides, water, and glass microspheres having pacified surfaces. There is also provided a method for making a fluid the method comprising (a) selecting a plurality of glass microspheres having alkaline surfaces; (b) coating the surfaces of the plurality of glass microspheres with an acid; and (c) combining the coated glass microspheres with (i) a mixture comprising at least two cross-linkable polysaccharides, and (ii) water. The fluids are useful, for example, as a drilling fluid.