US2933364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed recording system
Assignee: Individual
•
Filing: 1956-04-27
•
Granted: 1960-04-19
•
Expires: 1976-04-27
Abstract
No abstract record available.
Inventors
- 👤 Charles A Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:25
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/22; H03M1/24; H03M1/245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2643172A
Cited
US2566078A
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US2571680A
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US2639209A
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US2779654A
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US2706215A
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US2715678A
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US2686299A
Cited
US2791746A
Cited
US2769680A
Cited
US2796314A
Cited
US2830759A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |