Patent US1565596A successfully refreshed from Google Patents.
US1565596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal system
Assignee: AT&T Inc
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Filing: 1923-11-15
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Granted: 1925-12-15
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Expires: 1943-11-15
Abstract
No abstract record available.
Inventors
- 👤 Homer C Snook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:58
CPC Classifications
H; H03; H03B; H03B17/00; G; G04; G04C; G04C3/00; G04C3/02; G04C3/027; G04C3/0278
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1928-12-14 | 1929-06-15 | 1929-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-12-14 | 1933-06-15 | 1933-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-12-14 | 1937-06-15 | 1937-12-15 | $7700.00 | Window Closed / Lapsed |