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. 07, 2011
Filed:
Jul. 20, 2004
Applicants:
Luigi Merli, Sugar Land, TX (US);
Guido DE Stefano, Houston, TX (US);
Giuseppe LI Bassi, Gavirate, IT;
Inventors:
Luigi Merli, Sugar Land, TX (US);
Guido De Stefano, Houston, TX (US);
Giuseppe Li Bassi, Gavirate, IT;
Assignee:
Lamberti SpA, Albizzate, IT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K 8/38 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a liquid, self-breakable, temporary viscosifier agent (yield point enhancer) for oil based drilling muds, obtained by reacting one or more dicarboxylic fatty acids with a secondary dialkanolamine and thereafter with a tertiary tialkanolamine, and to oil based drilling muds containing it.