US3586898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum chloride discharge lamp
Assignee: General Electric Co
•
Filing: 1969-05-19
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Granted: 1971-06-22
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Expires: 1989-05-19
Abstract
Abstract A metal halide high intensity lamp containing A1C13 and providing a continuous spectrum. Excess aluminum in the filling gives thermodynamic stability against attack of the tungsten electrodes and other lamp metals by chlorine, and an alumina envelope is used which does not react with A1C13. The filling also preferably contains aluminum tri-iodide, mercury for a buffer gas, and an inert gas to facilitate starting.
Inventors
- 👤 Dimitrios M Speros
- 👤 William E Smyser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:00
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/12; H01J61/125
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
13 words
A lamp as in claim 1 wherein the filling also includes aluminum tri-iodide.
Claim 2
Dependent Claim
14 words
A lamp as in claim 1 wherein the filling includes aluminum tri-iodide. and mercury.
Claim 3
Dependent Claim
14 words
A lamp as in claim 1 wherein the envelope is high density polycrystalline alumina.
Claim 4
Dependent Claim
21 words
A lamp as in claim 1 wherein the envelope is fused silica coated internally with a protective layer of aluminum oxide.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |