US2512432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of and apparatus for locating sound signals on magnetic type sound record carriers
Assignee: BRITISH ACOUSTIC FILMS Ltd
•
Filing: 1947-07-18
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Granted: 1950-06-20
•
Expires: 1967-07-18
Abstract
No abstract record available.
Inventors
- 👤 Kolb Otto Kurt
- 👤 Petersen Axel Carl Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:42
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/02; G11B27/06; G11B27/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE639016C
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FR715411A
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US2029730A
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US2284150A
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US2260702A
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US2336777A
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US2348050A
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US2424218A
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US2416353A
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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) | 1953-06-19 | 1953-12-19 | 1954-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-19 | 1957-12-19 | 1958-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-19 | 1961-12-19 | 1962-06-20 | $7700.00 | Window Closed / Lapsed |