US2917699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alternators and/or associated filter networks
Assignee: De Havilland Propellers Ltd
•
Filing: 1955-03-31
•
Granted: 1959-12-15
•
Expires: 1975-03-31
Abstract
No abstract record available.
Inventors
- 👤 Grant Braham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:20
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/01; H03H7/17; H03H7/1741; H03H7/1791; H03H7/0115; H03H7/1716; H03H7/1725
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1362081A
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US1284743A
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US1920948A
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FR724869A
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GB410182A
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US1998325A
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GB446223A
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US2569000A
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GB677932A
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US2724062A
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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) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |