Patent US2442872A successfully refreshed from Google Patents.
US2442872A
Expired / Lapsed
US
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Pulse controlled selector circuit
Assignee: COLONIAL RADIO Corp
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Filing: 1944-05-27
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Granted: 1948-06-08
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Expires: 1964-05-27
Abstract
No abstract record available.
Inventors
- 👤 Giansante Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:10
CPC Classifications
G; G08; G08C; G08C19/00; G08C19/16; G08C19/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1226184A
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US1607868A
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US1650575A
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US1972941A
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US2048506A
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US2404918A
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US2310105A
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US2303016A
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US2342753A
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US2373134A
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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) | 1951-06-08 | 1951-12-08 | 1952-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-08 | 1955-12-08 | 1956-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-08 | 1959-12-08 | 1960-06-08 | $7700.00 | Window Closed / Lapsed |