US2933051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for pumping
Assignee: Commonwealth Engineering Company of Ohio
•
Filing: 1956-04-25
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Granted: 1960-04-19
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Expires: 1976-04-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry A Toulmin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:49
CPC Classifications
F; F04; F04B; F04B23/00; F04B23/02; F04B23/021; F04B17/00; F04B17/03; F04B17/04; F04B17/042; F04B43/00; F04B43/02; F04B43/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR391283A
Cited
US1042227A
Cited
US2254495A
Cited
US2434804A
Cited
GB631521A
Cited
US2573299A
Cited
US2691346A
Cited
US2634684A
Cited
FR1102008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |