| US 7,572,163 B2 | ||
| High intensity discharge lamps, arc tubes, and methods of manufacture | ||
| Juris Sulcs, Chagrin Falls, Ohio (US); and Abbas Lamouri, Aurora, Ohio (US) | ||
| Assigned to Advanced Lighting Technologies, Inc., Solon, Ohio (US) | ||
| Filed on Jul. 13, 2005, as Appl. No. 11/179,653. | ||
| Claims priority of provisional application 60/669380, filed on Apr. 08, 2005. | ||
| Claims priority of provisional application 60/587048, filed on Jul. 13, 2004. | ||
| Prior Publication US 2006/0014466 A1, Jan. 19, 2006 | ||
| Int. Cl. H01J 9/38 (2006.01) | ||
| U.S. Cl. 445—39 [445/23; 445/38; 445/42] | 27 Claims |
| 1. A method of making an arc tube for a high intensity discharge lamp wherein the arc tube includes a fill gas at superatmospheric
pressure at substantially room temperature, said method comprising the steps of:
(a) providing an arc tube body having a light-emitting chamber;
(b) freezing a predetermined amount of fill gas in the chamber;
(c) evacuating gaseous fill from the chamber; and
(d) hermetically sealing the chamber.
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