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Patent US2630989A successfully refreshed from Google Patents.
US2630989A
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Landing gear for use on inclined surfaces
Assignee: UNITED AIRCARFT Corp
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Filing: 1948-11-23
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Granted: 1953-03-10
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Expires: 1968-11-23
Abstract
No abstract record available.
Inventors
- 👤 Igor I Sikorsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:32
CPC Classifications
B; B64; B64C; B64C25/00; B64C25/32; B64C25/58; B64C25/62; B64C25/001; B64C2025/008; B64C2025/325
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1918426A
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US2101611A
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FR819026A
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GB505263A
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US2365424A
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US2368855A
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US2368501A
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US2381842A
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US2387713A
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US2519522A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |