US2954441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide band magnetic system
Assignee: Ampex Corp
•
Filing: 1955-12-13
•
Granted: 1960-09-27
•
Expires: 1975-12-13
Abstract
No abstract record available.
Inventors
- 👤 Charles E Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:36
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/79; H04N9/80; H04N9/82
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2245286A
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US2583983A
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US2635140A
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US2686831A
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US2697755A
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US2685079A
Cited
US2668283A
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US2764463A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-27 | 1964-03-28 | 1964-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-27 | 1968-03-28 | 1968-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-27 | 1972-03-28 | 1972-09-27 | $7700.00 | Window Closed / Lapsed |