Patent US2461029A successfully refreshed from Google Patents.
US2461029A
Expired / Lapsed
US
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Luminescent tube system and apparatus
Assignee: NAT INV S CORP
•
Filing: 1943-04-12
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Granted: 1949-02-08
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Expires: 1963-04-12
Abstract
No abstract record available.
Inventors
- 👤 Boucher Charles Philippe
- 👤 Kuhl Frederick August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:41
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/08; H01F38/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1893251A
Cited
US2103774A
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US2088803A
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US2170456A
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US2212198A
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US2298935A
Cited
US2352073A
Cited
US2312768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-08 | 1952-08-09 | 1953-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-08 | 1956-08-09 | 1957-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-08 | 1960-08-09 | 1961-02-08 | $7700.00 | Window Closed / Lapsed |