US3443249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave limiter circuit and apparatus
Assignee: AT&T Inc
•
Filing: 1966-11-22
•
Granted: 1969-05-06
•
Expires: 1986-11-22
Abstract
No abstract record available.
Inventors
- 👤 Francis R Ashley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:27
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/02; H03C3/04; H03G; H03G11/00; H03G11/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1825304A
Cited
US2003428A
Cited
US2205843A
Cited
US2293628A
Cited
US2373569A
Cited
US2682640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-05 | 1972-11-04 | 1973-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-05 | 1976-11-04 | 1977-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-05 | 1980-11-04 | 1981-05-06 | $7700.00 | Window Closed / Lapsed |