Patent US3511940A successfully refreshed from Google Patents.
US3511940A
Expired / Lapsed
US
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Magnetic recording and reproducing system
Assignee: Individual
•
Filing: 1963-09-24
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Granted: 1970-05-12
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Expires: 1983-09-24
Abstract
No abstract record available.
Inventors
- 👤 Jerome H Lemelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:17
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/10; G11B27/19; G11B27/28; B; B07; B07C; B07C3/00; B07C3/18; G06; G06K; G06K17/00; G06K7/00; G06K7/08; G06K7/082; G06K7/083; G06K7/084; G07; G07C; G07C9/00; G07C9/20; G07C9/22; G07C9/25; G07C9/257; G11B15/00; G11B15/18; G11B15/1883; G11B15/1891; G11B15/675; G11B15/68; G11B15/682; G11B15/683; G11B15/6845; G11B15/687; G11B15/6875; G11B15/6895; G11B27/102; G11B27/107; G11B2220/00; G11B2220/40; G11B2220/41; G11B2220/90
Claims Analysis
Total Claims: 0
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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) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |