Patent US2617256A successfully refreshed from Google Patents.
US2617256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic pumping jack control
Assignee: PELTON WATER WHEEL Co
•
Filing: 1948-06-12
•
Granted: 1952-11-11
•
Expires: 1968-06-12
Abstract
No abstract record available.
Inventors
- 👤 White Ira Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:51
CPC Classifications
F; F04; F04B; F04B47/00; F04B47/02; F04B47/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1906965A
Cited
US1943061A
Cited
US1910766A
Cited
US2069122A
Cited
US2167623A
Cited
US2185448A
Cited
US2276358A
Cited
US2331337A
Cited
US2367248A
Cited
US2325138A
Cited
US2355669A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |