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:
Jan. 29, 2013
Filed:
Sep. 21, 2009
Applicants:
Robert L. Horton, Sugar Land, TX (US);
Bethicia B. Prasek, The Woodlands, TX (US);
Inventors:
Robert L. Horton, Sugar Land, TX (US);
Bethicia B. Prasek, The Woodlands, TX (US);
Assignee:
M-I L.L.C., Houston, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01N 31/16 (2006.01); G01N 31/22 (2006.01); G01N 33/24 (2006.01);
U.S. Cl.
CPC ...
Abstract
Disclosed herein is an indicator precursor composition for determining the hardness of a wellbore fluid filtrate, where the composition includes a colorimetric indicator and a buffer, where the buffer may include a salt of a weak acid and a strong base, and where the indicator precursor may be a dry solid. Also disclosed is a method for determining the hardness of a wellbore fluid filtrate.