US2645549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for recording the listening habits of wave signal receiver users
Assignee: TNC US Holdings Inc
•
Filing: 1948-06-18
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Granted: 1953-07-14
•
Expires: 1968-06-18
Abstract
No abstract record available.
Inventors
- 👤 George H Bateman
- 👤 Krahulec Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:58
CPC Classifications
H; H04; H04H; H04H60/00; H04H60/29; H04H60/32; H04H60/35; H04H60/38; H04H60/41; H04H60/43
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1269525A
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US1961170A
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US2032558A
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US2175937A
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US2258677A
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US2305834A
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US2259790A
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US2364603A
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US2385641A
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US2439201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |