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:
Nov. 02, 2004
Filed:
Feb. 04, 2003
Nikolay Natchev, Manchester, NH (US);
Lori R. Brock, Gloucester, MA (US);
Harold L. Rothwell, Jr., Hopkinton, NH (US);
Osram Sylvania Inc., Danvers, MA (US);
Abstract
Arc tube ( ) has a bulbous body ( ) with a hollow center portion ( ) and opposite ends ( ). Each of these ends has a cylindrical terminal-receiving section ( ) extending therefrom. The hollow center portion ( ) has an internal length A and an internal diameter B that provides an aspect ratio of less than 5 and an outer surface area to inner surface area ratio, measured in square units, of less than 1.5. Electrodes ( ) and ( ) are hermetically sealed in the terminal-receiving sections ( ). The lamp uses less than 7 mgs of mercury. The low pressure operation allows the use of the arc tube in lamps without a shroud and the low mercury allow the lamp to pass TCLP requirement and be conventionally landfilled.