US2767254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording
Assignee: RCA Corp
•
Filing: 1951-09-28
•
Granted: 1956-10-16
•
Expires: 1971-09-28
Abstract
No abstract record available.
Inventors
- 👤 Raymond E Lafferty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:40
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/265; G10; G10K; G10K15/00; G10K15/08; G10K15/10; G11B5/02; Y; Y10; Y10S; Y10S84/00; Y10S84/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2352023A
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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) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |