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:
Sep. 22, 1992
Filed:
Jun. 27, 1991
Applicant:
Inventors:
Rudy E Geens, Leuven, BE;
Elliot F Wyner, Peabody, MA (US);
Assignees:
GTE Products Corporation, Danvers, MA (US);
GTE Sylvania N.V., Tienen, BE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
315326 ; 315358 ; 313565 ; 313571 ; 313639 ; 313642 ;
Abstract
A high pressure sodium lamp having a fill within an elongated arc tube comprising an inert starting gas, mercury and sodium wherein said mercury and sodium being are in an amount less than two milligrams per cubic centimeter of said volume of the interior of the arc tube wherein the weight ratio of sodium to mercury is less than 1 to 20 whereby the lamp is saturated with sodium and unsaturated with mercury at said predetermined nominal output voltage and does not extinguish at an input voltage exceeding about 90 percent of said rated voltage.