IP Library › Granted Patent US 8,449,343
Granted Patent B2
US 8,449,343 · App. 12/686,635 · Granted May 28, 2013

Discharge lamp having a heat resistant film and method for producing same

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Quick Facts
Patent No.
US 8,449,343
App. No.
12/686,635
Granted
May 28, 2013
Kind
B2
Abstract

A discharge lamp includes an arc tube and a boron oxide film formed on an inner surface of the arc tube.

Claims (5)

1. A method for producing a discharge lamp, comprising:

applying a liquid material including boron oxide on an inner surface of an arc tube,

wherein the liquid material is prepared by introducing particles of the boron oxide into a medium and dispersing or dissolving the particles of the boron oxide in the medium; and

heating the applied liquid material to form a film substantially composed of boron oxide on the inner surface of the arc tube.

2. The method according to claim 1 , wherein the discharge lamp is one of a halogen lamp, a metal halide lamp, or a high-pressure mercury lamp.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 2, 2022
From: SEIKO EPSON CORP.
To: COLUMBIA PEAK VENTURES, LLC
Reel/Frame 058952/0475 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 13, 2010
From: NISHIYAMA, YOSHIHIDE; SAKURAI, NOBORU
To: SEIKO EPSON CORPORATION
Reel/Frame 023777/0882 →