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:
Nov. 06, 2012
Filed:
Oct. 22, 2009
David Velasco, Mount Laurel, NJ (US);
John Ditri, Huntingdon Valley, PA (US);
Nancy E. Wasson, Mount Laurel, NJ (US);
David S. Munsky, New York, NY (US);
Mark Trent, Cambridge, CA;
David Velasco, Mount Laurel, NJ (US);
John Ditri, Huntingdon Valley, PA (US);
Nancy E. Wasson, Mount Laurel, NJ (US);
David S. Munsky, New York, NY (US);
Mark Trent, Cambridge, CA;
Lockheed Martin Corporation, Bethesda, MD (US);
Abstract
A matched glass-to-metal connecting device for use in a vacuum tube collector for a solar energy collecting apparatus is made of a glass envelope and a metal sleeve directly bonded to the glass envelope. The glass envelope is made of a glass having a composition, in percent by weight on the basis of oxide content, consisting essentially of BO, 19; AlO, 8; NaO, 2; KO, 3; BaO, 3; LiF, 1; and balance of SiOand the metal sleeve consists of metal material number 1.3981 of DIN 17745. The glass envelope has a thermal expansion coefficient that deviates from the metal part's thermal expansion coefficient by no more than 4% in the temperature range from 25° C. to 350° C.