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. 25, 2003
Filed:
Aug. 23, 2002
Richard S. Speer, Concord, MA (US);
Louise D. Cleary, Salem, MA (US);
Joseph V. Lima, Salem, MA (US);
Osram Sylvania Inc., Danvers, MA (US);
Abstract
An amalgam assembly for a fluorescent lamp includes a glass exhaust tubulation extending toward a base portion of the lamp, the tubulation being closed at an end adjacent the lamp base portion, and a metal cup disposed in the tubulation and retained by a pinched portion of the tubulation. The cup defines an annular outer wall having a free edge extending toward the tubulation closed end, a tubular central core portion extending toward the tubulation closed end, and an annular trough formed by the core portion and the outer wall. A mercury amalgam ball is disposed between the metal cup and the tubulation closed end, a diameter of the ball exceeding an inner diameter of the core portion, and a coating of a metal wetting agent is disposed on interior surfaces of the trough.