US2696790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable discharge pump
Assignee: Individual
•
Filing: 1951-10-23
•
Granted: 1954-12-14
•
Expires: 1971-10-23
Abstract
No abstract record available.
Inventors
- 👤 Amos E Crow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:52
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/06; F01; F01C; F01C21/00; F01C21/08; F01C21/0809; F01C21/0818; F01C21/0827
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US732671A
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US741617A
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US939911A
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US968859A
Cited
US1393802A
Cited
US1846557A
Cited
US2175413A
Cited
US2523543A
Cited
US2498826A
Cited
US2555678A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-13 | 1958-06-14 | 1958-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-13 | 1962-06-14 | 1962-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-13 | 1966-06-14 | 1966-12-14 | $7700.00 | Window Closed / Lapsed |