Patent US2869116A successfully refreshed from Google Patents.
US2869116A
Expired / Lapsed
US
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Automatic keyer for lifeboat radio equipment
Assignee: Mackay Radio & Telegraph Co
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Filing: 1954-01-28
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Granted: 1959-01-13
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Expires: 1974-01-28
Abstract
No abstract record available.
Inventors
- 👤 Butterworth John William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:58
CPC Classifications
H; H04; H04L; H04L15/00; H04L15/04; H04L15/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1500785A
Cited
US2389786A
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US2459281A
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US2505781A
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US2500809A
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US2506429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |