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. 10, 2001
Filed:
Dec. 08, 1998
Christoffel Wijenberg, Eindhoven, NL;
Bernardus L. M. Van Bakel, Eindhoven, NL;
Ralph D. Wittig, Menlo Park, CA (US);
Sundararajarao Mohan, Cupertino, CA (US);
U.S. Philips Corporation, New York, NY (US);
Abstract
A high-pressure discharge lamp includes a ceramic discharge vessel which encloses a discharge space containing two electrodes and an ionizable filling including a metal halide. The discharge vessel includes a central cylindrical part with an end, and an end part closing the cylindrical part at the end in a gastight manner. The discharge vessel also has a projecting plug connected to the end part in a gastight manner for enclosing a feedthrough conductor. The end part is monolithic and its outside surface includes an angle A with the longitudinal axis of the discharge vessel at the projecting plug, where the angle A is between 30 and 60 degrees. The outside surface of the end part may be shaped like a truncated cone with a base extending radially outward. Alternatively, the end part includes two concentric tubular portions which are interconnected in a gastight manner.