Patent US2496374A successfully refreshed from Google Patents.
US2496374A
Expired / Lapsed
US
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Tubular electric lamp
Assignee: BOUCHER AND KEISER Co
•
Filing: 1943-11-24
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Granted: 1950-02-07
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Expires: 1963-11-24
Abstract
No abstract record available.
Inventors
- 👤 Boucher Charles Philippe
- 👤 Russell W Keiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:13
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2166951A
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US2009839A
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US1971940A
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US2065988A
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US2272486A
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US2307971A
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US2330850A
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US2331306A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-06 | 1953-08-08 | 1954-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-06 | 1957-08-08 | 1958-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-06 | 1961-08-08 | 1962-02-07 | $7700.00 | Window Closed / Lapsed |