US2669188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump impeller
Assignee: PATENT DEV Co
•
Filing: 1950-03-14
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Granted: 1954-02-16
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Expires: 1970-03-14
Abstract
No abstract record available.
Inventors
- 👤 Brouwer D Mcintyre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:57
CPC Classifications
F; F04; F04D; F04D5/00; F04D29/00; F04D29/18; F04C; F04C2/00; F04C2/30; F04C2/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |