US3022461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency and/or phase demodulator
Assignee: Ampex Corp
•
Filing: 1959-07-20
•
Granted: 1962-02-20
•
Expires: 1979-07-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Dwight D Wilcox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:15
CPC Classifications
H; H03; H03D; H03D3/00; H03D3/02; H03D3/18; H03D3/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2453958A
Cited
US2585532A
Cited
US2876382A
Cited
US2835803A
Cited
US2873367A
Cited
US2872595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |