US2589067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic control system
Assignee: Woodward Inc
•
Filing: 1947-05-26
•
Granted: 1952-03-11
•
Expires: 1967-05-26
Abstract
No abstract record available.
Inventors
- 👤 Francis L Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:52
CPC Classifications
G; G05; G05D; G05D13/00; F; F15; F15B; F15B21/00; Y; Y10; Y10T; Y10T137/00; Y10T137/0971; Y10T137/1044
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1382315A
Cited
US2344991A
Cited
US2373138A
Cited
US2342685A
Cited
US2409975A
Cited
US2420052A
Cited
US2478183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-11 | 1955-09-10 | 1956-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-11 | 1959-09-10 | 1960-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-11 | 1963-09-10 | 1964-03-11 | $7700.00 | Window Closed / Lapsed |