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US2500655A
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Constant speed and frequency drive
Assignee: Bendix Aviation Corp
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Filing: 1947-07-10
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Granted: 1950-03-14
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Expires: 1967-07-10
Abstract
No abstract record available.
Inventors
- 👤 Bevins James Emil
- 👤 Williams Harry Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:54
CPC Classifications
H; H02; H02P; H02P29/00; H02P29/0016; F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/46; F16H61/47
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2179962A
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US743484A
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US901117A
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US894588A
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GB139165A
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GB201235A
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US1787930A
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US2079724A
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US2255420A
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US2230717A
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US2376143A
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US2376142A
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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) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |