US2861185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compensated plate type limiter
Assignee: AT&T Inc
•
Filing: 1956-01-27
•
Granted: 1958-11-18
•
Expires: 1976-01-27
Abstract
No abstract record available.
Inventors
- 👤 Andrew L Hopper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:05
CPC Classifications
H; H03; H03G; H03G11/00; H03G11/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB427941A
Cited
US2171671A
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US2215777A
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US2329558A
Cited
US2299945A
Cited
US2362503A
Cited
US2390503A
Cited
US2466959A
Cited
US2512637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-17 | 1962-05-19 | 1962-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-17 | 1966-05-19 | 1966-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-17 | 1970-05-19 | 1970-11-18 | $7700.00 | Window Closed / Lapsed |