US2500655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant speed and frequency drive
Assignee: Bendix Aviation Corp
•
Filing: 1947-07-10
•
Granted: 1950-03-14
•
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 09:32
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2291011A
Cited
US2179962A
Cited
US743484A
Cited
US901117A
Cited
US894588A
Cited
GB139165A
Cited
GB201235A
Cited
US1787930A
Cited
US2079724A
Cited
US2255420A
Cited
US2230717A
Cited
US2376143A
Cited
US2376142A
Cited
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 |