Patent US1980931A successfully refreshed from Google Patents.
US2495591A
Expired / Lapsed
US
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Control equipment for stabilizing a platform mounted in a craft
Assignee: S Smith and Sons Ltd
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Filing: 1944-02-21
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Granted: 1950-01-24
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Expires: 1964-02-21
Abstract
No abstract record available.
Inventors
- 👤 Meredith Frederick William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:00
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/0055; G01; G01C; G01C21/00; G01C21/10; G01C21/12; G01C21/16; G01C21/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2455939A
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US1763128A
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US1876254A
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US1988458A
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US2014825A
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US2005530A
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US2126910A
Cited
US2242253A
Cited
US2361790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-23 | 1953-07-25 | 1954-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-23 | 1957-07-25 | 1958-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-23 | 1961-07-25 | 1962-01-24 | $7700.00 | Window Closed / Lapsed |