US2660663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Search signal apparatus for determining the listening habits of wave signal receiverusers
Assignee: TNC US Holdings Inc
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Filing: 1947-10-24
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Granted: 1953-11-24
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Expires: 1967-10-24
Abstract
No abstract record available.
Inventors
- 👤 Henry A Rahmel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:38
CPC Classifications
H; H04; H04H; H04H60/00; H04H60/35; H04H60/38; H04H60/41; H04H60/43
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1993395A
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US2093855A
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US2249324A
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US2275460A
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US2283523A
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US2344562A
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US2418750A
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US2421106A
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US2479208A
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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) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |