US2750452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selectivity control circuit
Assignee: RCA Corp
•
Filing: 1951-03-21
•
Granted: 1956-06-12
•
Expires: 1971-03-21
Abstract
No abstract record available.
Inventors
- 👤 Hunter C Goodrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:56
CPC Classifications
H; H03; H03G; H03G1/00; H03G1/0005; H03G1/0017
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2142038A
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US2255690A
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US2262707A
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US2323598A
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US2524035A
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US2585078A
Cited
US2544211A
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US2647957A
Cited
US2644859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |