US4101799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-pressure gas discharge lamp
Assignee: US Philips Corp
•
Filing: 1976-09-08
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Granted: 1978-07-18
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Expires: 1996-09-08
Abstract
Abstract A high-pressure gas discharge lamp having a discharge vessel of aluminium oxide or yttrium oxide. Disposed within the discharge vessel is an electrode which is connected to a vacuum tight led-out current supply conductor which consists mainly of borides from the group consisting of titanium boride and zirconium boride.
Inventors
- 👤 Piet Wiedijk
- 👤 Johannes Hubertus Antonius Schmitz
- 👤 Antonius Henricus Maria Van der Stap
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:03
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/36; H01J61/366
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
86 words
A high-pressure gas discharge lamp which comprises a discharge vessel having a wall which consists mainly of at least one of the compounds selected from the group consisting of aluminium oxide and yttrium oxide, said vessel containing an ionizable gas filling, means for maintaining a gas discharge which includes at least one electrode and a current supply conductor connected thereto, said conductor being disposed within said discharge vessel and consisting mainly of at least one boride selected from the group of titanium boride and zirconium boride.
Claim 2
Dependent Claim
86 words
A high-pressure gas discharge lamp which comprises a discharge vessel having a wall which consists mainly of at least one of the compounds selected from the group consisting of aluminium oxide and yttrium oxide, said vessel containing an ionizable gas filling, means for maintaining a gas discharge which includes at least one electrode and a current supply conductor connected thereto, said conductor being disposed within said discharge vessel and consisting mainly of at least one boride selected from the group of titanium boride and zirconium boride.
Claim 3
Dependent Claim
19 words
A high-pressure gas discharge lamp as claimed in claim 1 wherein said current supply conductor consists of titanium boride.
Claim 4
Dependent Claim
31 words
A high-pressure gas discharge lamp as claimed in claim 1 wherein said current supply conductor is a solid cylindrical member extending through a part of the wall of said discharge vessel.
Claim 5
Dependent Claim
32 words
A high-pressure gas discharge lamp as claimed in claim 1 wherein said current supply conductor is sealed vacuum tight to the wall of the discharge vessel by means of a sealing glass.
Claim 6
Dependent Claim
35 words
A high-pressure gas discharge lamp as claimed in claim 1 wherein said current supply conductor is sealed in a vacuum tight manner to said wall of said discharge vessel by means fo a sintered seal.
Claim 7
Dependent Claim
16 words
A high-pressure gas discharge lamp as claimed in claim 1 wherein said gas filling contains sodium.
Claim 8
Dependent Claim
20 words
A high-pressure gas discharge lamp as claimed in claim 1 wherein said gas filling contains at least one metal halide.
References Cited (Backward Citations)
US3003885A
Cited
US3363133A
Cited
US3503801A
Cited
US3705112A
Cited
US3915900A
Cited
US3928244A
Cited
US4011480A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |