US2890660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-clogging centrifugal pump
Assignee: Ajem Laboratories Inc
•
Filing: 1953-05-26
•
Granted: 1959-06-16
•
Expires: 1973-05-26
Abstract
No abstract record available.
Inventors
- 👤 Umbricht Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:24
CPC Classifications
F; F04; F04D; F04D7/00; F04D7/02; F04D7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1791547A
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Cited
US2283263A
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GB566336A
Cited
US2515398A
Cited
US2542896A
Cited
US2659312A
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US2622537A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-15 | 1962-12-15 | 1963-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-15 | 1966-12-15 | 1967-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-15 | 1970-12-15 | 1971-06-16 | $7700.00 | Window Closed / Lapsed |