Patent US2439711A successfully refreshed from Google Patents.
US2439711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical measurement of displacement
Assignee: Woodward Inc
•
Filing: 1943-06-14
•
Granted: 1948-04-13
•
Expires: 1963-06-14
Abstract
No abstract record available.
Inventors
- 👤 Donald E Bovey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:16
CPC Classifications
G; G05; G05B; G05B11/00; G05B11/01; G05B11/012; G05B11/013
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1959804A
Cited
US1964141A
Cited
US2126910A
Cited
US2268956A
Cited
US2258837A
Cited
US2285540A
Cited
US2340609A
Cited
US2324215A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-13 | 1951-10-13 | 1952-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-13 | 1955-10-13 | 1956-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-13 | 1959-10-13 | 1960-04-13 | $7700.00 | Window Closed / Lapsed |