US2526595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precision pulse failure alarm circuit
Assignee: AT&T Inc
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Filing: 1945-10-11
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Granted: 1950-10-17
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Expires: 1965-10-11
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry M Watts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:08
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/04; G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-16 | 1954-04-17 | 1954-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-16 | 1958-04-17 | 1958-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-16 | 1962-04-17 | 1962-10-17 | $7700.00 | Window Closed / Lapsed |