Patent US2649077A successfully refreshed from Google Patents.
US2649077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston assembly for oscillatory hydraulic actuators
Assignee: North American Aviation Corp
•
Filing: 1951-07-30
•
Granted: 1953-08-18
•
Expires: 1971-07-30
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Mehm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:31
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/12; F15B15/125
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US280974A
Cited
GB190103595A
Cited
US1076120A
Cited
US1250569A
Cited
US1577579A
Cited
US1799298A
Cited
US2286452A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |