US2580512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Altimeter control of servo system
Assignee: Individual
•
Filing: 1948-01-23
•
Granted: 1952-01-01
•
Expires: 1968-01-23
Abstract
No abstract record available.
Inventors
- 👤 John H Broadbent
- 👤 Mitchell Henry Rees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:33
CPC Classifications
F; F41; F41G; F41G7/00; F41G7/20; F41G7/30; F41G7/301
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR595749A
Cited
US1793213A
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US1815516A
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US2159142A
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US2306578A
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US2401168A
Cited
US2311118A
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US2351980A
Cited
US2387795A
Cited
US2412471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |