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. 13, 2014
Filed:
Dec. 31, 2009
Tihana Fuss, Derry, NH (US);
Laurie San-miguel, Cavaillon, FR;
Kevin R. Dickson, Hudson, OH (US);
Walter T. Stephens, Cleveland, OH (US);
Tihana Fuss, Derry, NH (US);
Laurie San-Miguel, Cavaillon, FR;
Kevin R. Dickson, Hudson, OH (US);
Walter T. Stephens, Cleveland, OH (US);
Saint-Gobain Ceramics & Plastics, Inc., Worcester, MA (US);
Abstract
Disclosed is a process for producing ceramic particles, such as proppants, that have at least 10 percent total porosity. The process includes forming a particle precursor that includes 5 percent to 30 percent of a first ceramic material and at least 40 percent of a second ceramic material. The sintering temperature of the first ceramic material may be lower than the sintering temperature of a second ceramic material. Heating the precursor to a maximum temperature above the sintering temperature of the first material and below the sintering temperature of the second material. Also disclosed is a ceramic article that has a particular combination of chemistry and alumina crystalline phase.