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:
Jul. 12, 2011
Filed:
Mar. 12, 2008
Applicants:
Kevin R. Dickson, Hudson, OH (US);
Walter T. Stephens, Cleveland, OH (US);
Tihana Fuss, Marlborough, MA (US);
Inventors:
Kevin R. Dickson, Hudson, OH (US);
Walter T. Stephens, Cleveland, OH (US);
Tihana Fuss, Marlborough, MA (US);
Assignee:
Saint-Gobain Ceramics & Plastics, Inc., Worcester, MA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B32B 5/16 (2006.01); B28B 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
One embodiment of the present invention relates to spherical ceramic elements, such as proppants, for maintaining permeability in subterranean formations to facilitate extraction of oil and gas therefrom. The strength of the ceramic element may be enhanced by combining materials having different coefficients of thermal expansion. Methods of making the ceramic elements are also disclosed.