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, 2003
Filed:
Jun. 27, 2001
Applicant:
Inventors:
William F. Kepler, Golden, CO (US);
Kurt F. von Fay, Morrison, CO (US);
Assignee:
The United States of America as represented by the Secretary of the Interior, Washington, D.C., US;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B 2/424 ;
U.S. Cl.
CPC ...
C04B 2/424 ;
Abstract
A cement mixture is provided for preventing or reducing the formation of micro-cracks during hydration. The cement mixture includes both a conventional cement and a cement micro-encapsulated in a time-release polymer coating. The micro-encapsulated cement does not hydrate until a few hours to a few days after the bulk of the conventional cement has hydrated, thereby allowing for autogenous healing of small cracks.