Patent US3581133A successfully refreshed from Google Patents.
US3581133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gaseous discharge tube with metallically coated, electrode support portions
Assignee: Ushio Denki KK
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Filing: 1968-12-23
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Granted: 1971-05-25
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Expires: 1988-12-23
Abstract
Abstract A discharge tube characterized in that a coat of an element selected from the group consisting of rhenium, niobium and rhodium is applied to a supported portion of an electrode or an electrode supporting member of an electrode which is supported by an electrode supporting portion of a quartz or glass envelope of the discharge tube.
Inventors
- 👤 Jiro Ushio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:19
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/04; H01J61/06; H01J61/073; H01J61/0735
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
105 words
A discharge tube comprising a spherical vitreous container having two tubular extensions thereon, two electrodes made of tungsten or molybdenum sealed therein, a gaseous or vaporous atmosphere therein, seal members in said tubular extensions, electrode supporting rods for supporting said electrodes and connecting an electric source to said electrodes, vitreous rod supporting portions on said tubular extensions for supporting portions of said electrode supporting rods, and metal coatings applied to said portions of the electrode supporting rods, said metal coatings being made of a metal selected from the group consisting of rhenium, niobium and rhodium and having a thickness of 0.001 to 10 Mu .
References Cited (Backward Citations)
US2200939A
Cited
US2504521A
Cited
US2617068A
Cited
US2697130A
Cited
US2781470A
Cited
US3281174A
Cited
US3278778A
Cited
US3386160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |