Electrodeless lamp with improved efficacy

Patent 5831386 Issued on November 3, 1998. Estimated Expiration Date:

November 3, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3234421

3748520

3764843

3873884

Resonance lamp having a triatomic gas source
Patent #: 3984727
Issued on: 10/05/1976
Inventor: Young

Atomic spectral lamp
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Microwave powered electrodeless light source utilizing de-coupled modes
Patent #: 4749915
Issued on: 06/07/1988
Inventor: Lynch , et al.

Metal halide lamps with oxidized frame parts
Patent #: 4918352
Issued on: 04/17/1990
Inventor: Hess, et al.

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Inventors

Application

No. 324475 filed on 10/17/1994

US Classes:

313/570, Greater than 760 torr313/161, Gas or vapor type313/573, Having specified envelope detail313/638, With metal vapor315/248, Induction-type discharge device load315/344Electromagnetic influenced discharge device

Examiners

Primary: Patel, Ashok

Attorney, Agent or Firm

Pollock, Vande Sande & Priddy

Foreign Patent References

52-31583 JP. 03/13/1977
A-55-10755 JP. 01/13/1980
55-95265 JP. 07/13/1998
1282239 SU. 07/13/1987
WO92/08240 WO. 05/13/1992
WO93/21655 WO. 10/13/1993
WO94/08439 WO. 04/13/1994
WO95/28069 WO. 10/13/1995

International Class

H01J 017/20

Abstract

A sulfur, selenium, and/or tellurium based lamp for providing visible light. The lamp is operated in a regime for providing high efficacy wherein the ratio of the volume to surface area of the bulb is greater than 0.45 cm, the concentration of the sulfur, selenium, or tellurium is less than 1.75 mg/cc, and the power density is between about 100 watts/cc and 5 watts/cc.

Other References

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Bentley et al., "Preparation of Electrodeless Discharge Lamps For Elements Forming Gaseous Covalent Hydrides", Analytical Chemistry, vol. 49, No. 4, Apr. 1977, pp. 551-554, Columbus US
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Abstract of "A Novel High Efficacy Microwave Powered Light Source", from Invited Papers and Abstracts, The 6th International Symposium On The Science & Technology of Light Sources, Budapest--Hungary, 30 Aug.-3 Sep. 1992
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