US2678382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic radio listener survey system
Assignee: Individual
•
Filing: 1948-12-16
•
Granted: 1954-05-11
•
Expires: 1968-12-16
Abstract
No abstract record available.
Inventors
- 👤 William D Horn
- 👤 John R Ragazzini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:31
CPC Classifications
H; H04; H04H; H04H60/00; H04H60/61; H04H60/64; H04H60/66; H04H60/35; H04H60/38; H04H60/41; H04H60/44; H04H60/56; H04H60/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2188165A
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US2213886A
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US2354836A
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US2427670A
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US2413965A
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US2439201A
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US2558754A
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US2500935A
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US2484734A
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US2484733A
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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) | 1957-05-10 | 1957-11-09 | 1958-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-10 | 1961-11-09 | 1962-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-10 | 1965-11-09 | 1966-05-11 | $7700.00 | Window Closed / Lapsed |