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:
Feb. 17, 1987
Filed:
Sep. 03, 1985
Applicant:
Inventors:
Nancy J Caruso, Livingston, NJ (US);
Michael H Masto, Bloomfield, NJ (US);
Assignee:
North American Philips Electric Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
445-6 ; 445-9 ; 445 16 ; 445 54 ;
Abstract
A metal halide lamp provides exceptional color rendition because of a high calcium iodide partial pressure. A long-arc ellipsoidal arc tube provides a high 'cold spot' temperature. The method of manufacture of the lamp includes heating the arc tube tubulation while burning the lamp after dosing, and then an evacuation step to eliminate moisture due to the hygroscopic calcium iodide.