Patent US2704489A successfully refreshed from Google Patents.
US2704489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Servo system for aircraft turrets
Assignee: Unisys Corp
•
Filing: 1943-04-17
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Granted: 1955-03-22
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Expires: 1963-04-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Edmund B Hammond
- 👤 Willis G Wing
- 👤 Jr F Norton Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:50
CPC Classifications
F; F41; F41G; F41G5/00; F41G5/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1559566A
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US1612118A
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US1825994A
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US1747349A
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US2040014A
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US2088654A
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US2189823A
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US2226288A
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US2160779A
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US2286561A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-21 | 1958-09-20 | 1959-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-21 | 1962-09-20 | 1963-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-21 | 1966-09-20 | 1967-03-22 | $7700.00 | Window Closed / Lapsed |