Patent US2467009A successfully refreshed from Google Patents.
US2467009A
Expired / Lapsed
US
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Circuit arrangement embodying cathode-ray tubes
Assignee: EMI Ltd
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Filing: 1946-12-12
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Granted: 1949-04-12
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Expires: 1966-12-12
Abstract
No abstract record available.
Inventors
- 👤 Bull Eric William
- 👤 Pemberton Max Eric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:06
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2164931A
Cited
US2157182A
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US2165803A
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US2258643A
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US2264567A
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US2230111A
Cited
US2406740A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-11 | 1952-10-11 | 1953-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-11 | 1956-10-11 | 1957-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-11 | 1960-10-11 | 1961-04-12 | $7700.00 | Window Closed / Lapsed |