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. 13, 2010
Filed:
Jun. 27, 2005
Jeffrey T. Neil, North Reading, MA (US);
Victor E. Perez, Manchester, NH (US);
Lewis H. Palmer, Iii, Swampscott, MA (US);
Joseph E. Lester, Lincoln, MA (US);
Jeffrey T. Neil, North Reading, MA (US);
Victor E. Perez, Manchester, NH (US);
Lewis H. Palmer, III, Swampscott, MA (US);
Joseph E. Lester, Lincoln, MA (US);
Osram Sylvania Inc., Danvers, MA (US);
Abstract
An incandescent lamp that emits infrared light and a method of making the lamp includes a filament assembly inside a polycrystalline aluminum oxide (PCA) envelope, where the filament assembly preferably has a coiled tungsten filament, solid metal ends of tungsten or molybdenum attached to the coiled tungsten filament, and leads at distal ends of the solid metal ends. End caps are attached to ends of the envelope and have openings through which a respective one of the leads extends, where the leads are each made of an electrically conductive material having a coefficient of thermal expansion compatible with the end caps, such as niobium. The leads are attached to the end caps with glass-ceramic sealing frits. The end caps and sealing frits seal a suitable gas inside the envelope.