US2996349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nrz recording circuitry
Assignee: Ampex Corp
•
Filing: 1957-11-29
•
Granted: 1961-08-15
•
Expires: 1977-11-29
Abstract
No abstract record available.
Inventors
- 👤 Paul A Mauch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:34
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/04; H03K3/05; H03K3/06; H03K3/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2684468A
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US2633402A
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US2797320A
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US2815498A
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US2719964A
Cited
US2907895A
Cited
US2838675A
Cited
US2844723A
Cited
US2824776A
Cited
US2928011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |