Patent US2753005A successfully refreshed from Google Patents.
US2753005A
Expired / Lapsed
US
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Tiltable rotor unit with counterrotating propellers
Assignee: Individual
•
Filing: 1951-12-29
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Granted: 1956-07-03
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Expires: 1971-12-29
Abstract
No abstract record available.
Inventors
- 👤 Adolphe C Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:25
CPC Classifications
B; B64; B64D; B64D35/00; B64D35/08; B64D35/04; B64D35/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1806648A
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USRE22029E
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US1189680A
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US1414241A
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US1681019A
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US1842613A
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US1795334A
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US1788430A
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US1916092A
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US2461669A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-03 | 1960-01-02 | 1960-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-03 | 1964-01-02 | 1964-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-03 | 1968-01-02 | 1968-07-03 | $7700.00 | Window Closed / Lapsed |