US3437937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital squelch system
Assignee: WILCOX ELECTRIC CO Inc
•
Filing: 1966-08-08
•
Granted: 1969-04-08
•
Expires: 1986-08-08
Abstract
No abstract record available.
Inventors
- 👤 John N Warfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:52
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/34; H03G3/342
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3325738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |