US2797263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System and method for recording and reproducing records
Assignee: AMPEX ELECTRIC Corp
•
Filing: 1952-11-19
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Granted: 1957-06-25
•
Expires: 1972-11-19
Abstract
No abstract record available.
Inventors
- 👤 Dolby Ray Milton
- 👤 Louis L Fisher
- 👤 John M Wernli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:07
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/46; G11B15/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1857451A
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US1976355A
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US2496103A
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US2471916A
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US2604321A
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US2709204A
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US2627596A
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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) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |