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. 11, 2010
Filed:
Oct. 19, 2005
Stefaan M. Lambrechts, Beverly, MA (US);
Huiling Zhu, Lexington, MA (US);
Jakob Maya, Brookline, MA (US);
Timothy Lee Kelly, Boston, MA (US);
Stefaan M. Lambrechts, Beverly, MA (US);
Huiling Zhu, Lexington, MA (US);
Jakob Maya, Brookline, MA (US);
Timothy Lee Kelly, Boston, MA (US);
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An arc discharge metal halide lamp for use in selected lighting fixtures having a discharge chamber with light permeable walls of a selected shape bounding a discharge region of a selected volume through which walls a pair of electrodes are supported with ionizable materials being provided in the discharge region of the discharge chamber comprising at least one member selected from a group consisting of halides of cerium, dysprosium, holmium, lithium, sodium, praseodymium, thallium and thulium, and further comprising a halide of calcium in a selected fraction of that weight total of all halides present in the discharge chamber with this selection depending also on the addition or not of a halide of aluminum. Others of the foregoing halides that are present are provided in amounts with certain limits.