US3737709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas discharge tube comprising mercury vapor and provided with a getter
Assignee: US Philips Corp
•
Filing: 1971-11-02
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Granted: 1973-06-05
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Expires: 1991-11-02
Abstract
Abstract A getter for a gas discharge tube having mercury vapor in which the getter which is active at room temperature is separated from the mercury-containing atmosphere by porous sintered bodies.
Inventors
- 👤 J Hornman
- 👤 Esdonk J Van
- 👤 J Visser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:35
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/02; H01J17/22; H01J17/24; H01J61/00; H01J61/02; H01J61/24; H01J61/26; H01J7/00; H01J7/14; H01J7/18; H01J7/186
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
46 words
In a gas discharge tube having a mercury vapor-containing gas atmosphere the improvement being a non-evaporating getter having a gettermaterial which is operative at room temperature and which is separated in a predetermined manner from the surrounding space by one or more porous sintered metal bodies.
Claim 2
Dependent Claim
46 words
In a gas discharge tube having a mercury vapor-containing gas atmosphere the improvement being a non-evaporating getter having a gettermaterial which is operative at room temperature and which is separated in a predetermined manner from the surrounding space by one or more porous sintered metal bodies.
Claim 3
Dependent Claim
19 words
A gas discharge tube as claimed in claim 1, characterized in that the porous bodies consist of sintered tungsten.
Claim 4
Dependent Claim
16 words
The discharge tube of claim 1 wherein said gettermaterial is sandwiched between two sintered metal layers.
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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |