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:
May. 20, 2014
Filed:
Jun. 11, 2009
Koji Koyanagi, Wakayama, JP;
Toshiharu Kojima, Wakayama, JP;
Hotaka Yamamuro, Wakayama, JP;
Kao Corporation, Tokyo, JP;
Abstract
The present invention provides a cement slurry composition, containing a hydraulic cement material, (A) a first water-soluble low molecular weight compound and (B) a second water-soluble low molecular weight compound differing from the compound (A), wherein a combination of the compounds (A) and (B) is (I) the compound (A) selected from cationic surfactants and the compound (B) selected from anionic aromatic compounds; or (II) the compound (A) selected from cationic surfactants and the compound (B) selected from brominated compounds, and in the compound (A), a ratio of compounds having a hydrocarbon group of 18 or more carbon atoms is not less than 45% by weight.