US2431687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple prime mover control and synchronization
Assignee: Woodward Inc
•
Filing: 1944-03-10
•
Granted: 1947-12-02
•
Expires: 1964-03-10
Abstract
No abstract record available.
Inventors
- 👤 Drake George Ferrest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:10
CPC Classifications
H; H02; H02P; H02P5/00; H02P5/46; H02P5/50; F; F02; F02D; F02D29/00; F02D2700/00; F02D2700/07
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1553407A
Cited
US2205264A
Cited
US2199640A
Cited
US2258462A
Cited
US2252518A
Cited
US2264865A
Cited
US2264874A
Cited
US2327341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-01 | 1951-06-02 | 1951-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-01 | 1955-06-02 | 1955-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-01 | 1959-06-02 | 1959-12-02 | $7700.00 | Window Closed / Lapsed |