Patent US2996349A successfully refreshed from Google Patents.
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
2026-10-30 16:41
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/04; H03K3/05; H03K3/06; H03K3/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2684468A
Cited
US2633402A
Cited
US2797320A
Cited
US2815498A
Cited
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 |