US2697589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impeller wheel
Assignee: Individual
•
Filing: 1951-02-19
•
Granted: 1954-12-21
•
Expires: 1971-02-19
Abstract
No abstract record available.
Inventors
- 👤 Davey Kingsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:55
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/05; B01F27/11; B01F27/112; B01F27/1123
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1279515A
Cited
US1374843A
Cited
US1439328A
Cited
GB401583A
Cited
US2151146A
Cited
US2159856A
Cited
US2201947A
Cited
US2552057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-20 | 1958-06-21 | 1958-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-20 | 1962-06-21 | 1962-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-20 | 1966-06-21 | 1966-12-21 | $7700.00 | Window Closed / Lapsed |