US2578902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically operated pump
Assignee: Individual
•
Filing: 1947-09-15
•
Granted: 1951-12-18
•
Expires: 1967-09-15
Abstract
No abstract record available.
Inventors
- 👤 Smith Dale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:25
CPC Classifications
F; F04; F04B; F04B17/00; F04B17/03; F04B17/04; F04B17/042; F04B5/00; F04B5/02; H; H02; H02K; H02K33/00; H02K33/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR433838A
Cited
FR612719A
Cited
US1804375A
Cited
US1804376A
Cited
US2193141A
Cited
US2283886A
Cited
US2430151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |