Patent US2956503A successfully refreshed from Google Patents.
US2956503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pumps, particularly for delivery of sewage, thick slurries and the like liquids
Assignee: Individual
•
Filing: 1957-01-30
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Granted: 1960-10-18
•
Expires: 1977-01-30
Abstract
No abstract record available.
Inventors
- 👤 Neidl Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:35
CPC Classifications
F; F04; F04D; F04D11/00; F04D11/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE240004C
Cited
FR556762A
Cited
US2107090A
Cited
US2515538A
Cited
AT183980B
Cited
US2610836A
Cited
US2697589A
Cited
DE932556C
Cited
GB751591A
Cited
US2773453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |