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. 11, 1996
Filed:
May. 05, 1994
Applicant:
Inventor:
William C Allen, Pasadena, CA (US);
Assignee:
Union Oil Company of California, El Segundo, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ; C04B / ;
U.S. Cl.
CPC ...
106802 ; 106696 ; 106724 ; 106725 ; 106726 ; 106809 ; 106816 ; 106823 ; 264311 ; 427181 ; 427183 ; 138145 ;
Abstract
A concrete pipe liner is formed from a difficult-to-compact hydraulic cement slurry applied to a pipe interior. The slurry contains inorganic non-compactible hydraulic cement particles, a concrete superplasticizer component, water, and optionally and preferably filler particles. The pipe is then spun to centrifugally cast a stronger, denser pipe liner than a comparable liner containing no superplasticizer.