Patent US1815786A successfully refreshed from Google Patents.
US1815786A
Expired / Lapsed
US
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Printing telegraph control circuit
Assignee: Western Union Telegraph Co
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Filing: 1928-12-31
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Granted: 1931-07-21
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Expires: 1948-12-31
Abstract
No abstract record available.
Inventors
- 👤 James W Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:33
CPC Classifications
H; H04; H04L; H04L17/00; H04L17/02; H04L17/12
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) | 1934-07-20 | 1935-01-19 | 1935-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-07-20 | 1939-01-19 | 1939-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-07-20 | 1943-01-19 | 1943-07-21 | $7700.00 | Window Closed / Lapsed |