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:
Apr. 08, 2014
Filed:
Nov. 12, 2008
Ananda H. Kumar, Fremont, CA (US);
Dien Nguyen, San Jose, CA (US);
Martin Janousek, Sunnyvale, CA (US);
Tad Armstrong, Burlingame, CA (US);
Ananda H. Kumar, Fremont, CA (US);
Dien Nguyen, San Jose, CA (US);
Martin Janousek, Sunnyvale, CA (US);
Tad Armstrong, Burlingame, CA (US);
Bloom Energy Corporation, Sunnyvale, CA (US);
Abstract
A seal composition includes a first alkaline earth metal oxide, a second alkaline earth metal oxide which is different from the first alkaline earth metal oxide, aluminum oxide, and silica in an amount such that molar percent of silica in the composition is at least five molar percent greater than two times a combined molar percent of the first alkaline earth metal oxide and the second alkaline earth metal oxide. The composition is substantially free of boron oxide and phosphorus oxide. The seal composition forms a glass ceramic seal which includes silica containing glass cores located in a crystalline matrix comprising barium aluminosilicate, and calcium aluminosilicate crystals located in the glass cores.