US3424865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resettable fixed delay commercial squelch circuit
Assignee: Individual
•
Filing: 1967-09-05
•
Granted: 1969-01-28
•
Expires: 1987-09-05
Abstract
No abstract record available.
Inventors
- 👤 John F Marchand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:04
CPC Classifications
H; H01; H01H; H01H7/00; H01H7/02; G; G04; G04F; G04F3/00; G04F3/06; H01H43/00; H01H43/30; H01H43/301; H01H43/302; H03; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/34; H03G3/348; H03K; H03K17/00; H03K17/28; Y; Y10; Y10S; Y10S358/00; Y10S358/908
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3294901A
Cited
US2520732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |