Patent US2472519A successfully refreshed from Google Patents.
US2472519A
Expired / Lapsed
US
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Key-operated differential actuator
Assignee: —
•
Filing: —
•
Granted: 1949-06-07
•
Expires: 1966-06-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:48
CPC Classifications
G; G06; G06C; G06C1/00; F; F16; F16H; F16H31/00; F16H31/003; F16H31/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US308528A
Cited
US392837A
Cited
US400359A
Cited
US563435A
Cited
US585996A
Cited
US1534938A
Cited
US1325625A
Cited
CH105747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-06 | 1952-12-06 | 1953-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-06 | 1956-12-06 | 1957-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-06 | 1960-12-06 | 1961-06-07 | $7700.00 | Window Closed / Lapsed |