Patent US2581546A successfully refreshed from Google Patents.
US2581546A
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US
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Tubular electric discharge lamp unit
Assignee: Hartford National Bank and Trust Co
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Filing: 1946-04-27
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Granted: 1952-01-08
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Expires: 1966-04-27
Abstract
No abstract record available.
Inventors
- 👤 Mann Erno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:37
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/16; H05B41/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US706314A
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US2056635A
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US2301670A
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US2298336A
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US2276829A
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US2344122A
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US2273960A
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US2337745A
Cited
US2369123A
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US2448937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |