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. 06, 1986
Filed:
Apr. 03, 1985
Applicant:
Inventors:
Martin Hille, Liederbach, DE;
Wolfgang Friede, Eschborn, DE;
Heinz Wittkus, Frankfurt am Main, DE;
Friedrich Engelhardt, Frankfurt am Main, DE;
Ulrich Riegel, Frankfurt am Main, DE;
Assignee:
Hoechst Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08J / ;
U.S. Cl.
CPC ...
524-3 ; 523130 ; 524-4 ; 524-5 ; 524547 ; 524548 ; 524555 ; 524556 ; 524560 ; 524566 ; 526287 ; 526288 ; 166293 ; 166294 ; 166295 ; 252 / ; 252 / ;
Abstract
Cement slurries for deep holes, with a content of copolymers which are composed of 5-95% by weight of groups of the formula ##STR1## in which R.sub.1 is hydrogen or methyl,