US2941474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-priming pumping apparatus
Assignee: Fairbanks Morse and Co
•
Filing: 1956-08-20
•
Granted: 1960-06-21
•
Expires: 1976-08-20
Abstract
No abstract record available.
Inventors
- 👤 Malcolm S Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:46
CPC Classifications
F; F04; F04D; F04D9/00; F04D9/04; F04D9/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US753154A
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US907869A
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DE553765C
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US2424285A
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US2375571A
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US2397718A
Cited
GB572053A
Cited
US2524770A
Cited
US2484105A
Cited
US2403556A
Cited
US2631539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |