US2384515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal recording apparatus
Assignee: Western Union Telegraph Co
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Filing: 1943-01-13
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Granted: 1945-09-11
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Expires: 1963-01-13
Abstract
No abstract record available.
Inventors
- 👤 Raleigh J Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:32
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/12; B; B41; B41J; B41J2/00; B41J2/005
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) | 1948-09-10 | 1949-03-12 | 1949-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-09-10 | 1953-03-12 | 1953-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-09-10 | 1957-03-12 | 1957-09-11 | $7700.00 | Window Closed / Lapsed |