Patent US4348533A successfully refreshed from Google Patents.
Patent US2673266A successfully refreshed from Google Patents.
US2673266A
Expired / Lapsed
US
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Auxiliary discharge tube for igniting, preferably on direct current, electric discharge tubes
Assignee: Auralight AB
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Filing: 1951-06-05
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Granted: 1954-03-23
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Expires: 1971-06-05
Abstract
No abstract record available.
Inventors
- 👤 Bjorkman Karl Ake Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:31
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/02; H05B41/04; H05B41/06; H05B41/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |