Patent US2487550A successfully refreshed from Google Patents.
US2487550A
Expired / Lapsed
US
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Centering means for cathode-ray deflecting circuits
Assignee: RCA Corp
•
Filing: 1944-10-28
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Granted: 1949-11-08
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Expires: 1964-10-28
Abstract
No abstract record available.
Inventors
- 👤 Paul F G Holst
- 👤 Kirkwood Loren Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:24
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2110911A
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US2153140A
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GB473650A
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US2180365A
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US2213275A
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US2153638A
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US2221115A
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GB503502A
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US2215197A
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US2286894A
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US2269226A
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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) | 1952-11-07 | 1953-05-09 | 1953-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-07 | 1957-05-09 | 1957-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-07 | 1961-05-09 | 1961-11-08 | $7700.00 | Window Closed / Lapsed |