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. 22, 1976
Filed:
Feb. 27, 1975
Applicant:
Inventors:
Leonard J Persinski, Pittsburgh, PA (US);
Fred David Martin, McMurray, PA (US);
Sally Lee Adams, Pittsburgh, PA (US);
Assignee:
Calgon Corporation, Pittsburgh, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ; C04B / ; E21B / ;
U.S. Cl.
CPC ...
106 90 ; 106 97 ; 106314 ; 166293 ;
Abstract
Aqueous hydraulic cement compositions containing phosphonobutane tricarboxylic acid as a flow-property-improving and turbulence-inducing additive and its use in cementing wells is disclosed.