Patent US2857150A successfully refreshed from Google Patents.
US2857150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pump for control systems and method of establishing a fluid pressure
Assignee: Shell Development Co
•
Filing: 1954-06-14
•
Granted: 1958-10-21
•
Expires: 1974-06-14
Abstract
No abstract record available.
Inventors
- 👤 Sharp Joseph Goulding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:44
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/24; Y; Y10; Y10T; Y10T137/00; Y10T137/0971
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR588580A
Cited
US1594132A
Cited
US1550286A
Cited
FR31403E
Cited
US1805063A
Cited
US2035465A
Cited
GB550239A
Cited
US2492472A
Cited
US2545238A
Cited
US2621672A
Cited
US2716469A
Cited
US2537523A
Cited
US2575923A
Cited
US2621913A
Cited
US2756810A
Cited
US2681713A
Cited
GB721726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |