Patent US3753018A successfully refreshed from Google Patents.
US3753018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wall-stabilized high-pressure mercury and metal iodide vapour discharge lamp with outer envelope
Assignee: US Philips Corp
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Filing: 1971-07-08
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Granted: 1973-08-14
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Expires: 1991-07-08
Abstract
Abstract A wall-stabilised high-pressure mercury vapour discharge lamp having an ignition voltage of less than 500 volts. The discharge vessel of the lamp contains in addition to mercury the iodides of one or more other metals and a mixture of neon and argon. The discharge vessels is surrounded by an outer envelope which is filled with a mixture of nitrogen and neon. Furthermore a selective hydrogen getter is present within the outer envelope.
Inventors
- 👤 L Beijer
- 👤 A Driessen
- 👤 C Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:51
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/24; H01J61/26; H01J61/12; H01J61/18; H01J61/30; H01J61/34
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
53 words
A high-pressure mercury vapour discharge lamp as claimed in claim 1, wherein the rare gas mixture in the discharge vessel consists of from 0.1 to 5.0 percent by volume of argon, and from 99.9 to 95.0 percent by volume of neon at a pressure of from 10 to 100 torr at 20* C.
Claim 2
Dependent Claim
54 words
A high-pressure mercury vapour discharge lamp as claimed in claim 1 wherein the gas mixture between the discharge vessel and the outer envelope consists of nitrogen and neon, for which the pressure of neon at 20* C ranges from 50 to 300 torr and the pressure of nitrogen ranges from 100 to 400 torr.
Claim 3
Dependent Claim
18 words
A high-pressure mercury vapour discharge lamp as claimed in claim 1 wherein the hydrogen getter comprises zirconium metal.
References Cited (Backward Citations)
US2176134A
Cited
US3626229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |