US3058113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noise elimination circuit for pulse duration modulation recording
Assignee: Ampex Corp
•
Filing: 1959-03-30
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Granted: 1962-10-09
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Expires: 1979-03-30
Abstract
No abstract record available.
Inventors
- 👤 A M Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:25
CPC Classifications
H; H04; H04B; H04B14/00; H04B14/02; H04B14/026; G; G11; G11B; G11B20/00; G11B20/02; G11B20/08; H03; H03K; H03K7/00; H03K7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2418127A
Cited
US2636133A
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US2830191A
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US2660672A
Cited
US2853634A
Cited
US2794123A
Cited
US2863054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |