US3050587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bipolar clamp for pulse modulation systems
Assignee: AT&T Inc
•
Filing: 1959-05-13
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Granted: 1962-08-21
•
Expires: 1979-05-13
Abstract
No abstract record available.
Inventors
- 👤 Robert L Carbrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:49
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/10; H04B; H04B14/00; H04B14/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2576026A
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US2602918A
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US2657318A
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US2782303A
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GB725396A
Cited
US2870259A
Cited
US2851617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |