US2520724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary roller pump
Assignee: Individual
•
Filing: 1947-07-11
•
Granted: 1950-08-29
•
Expires: 1967-07-11
Abstract
No abstract record available.
Inventors
- 👤 Jessop Robert Edison Edouard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:32
CPC Classifications
F; F01; F01C; F01C21/00; F01C21/08; F01C21/0809; F01C21/0818; F01C21/0854; F01C21/0863
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US425756A
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GB142817A
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AT91839B
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GB184873A
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US1553681A
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US1805668A
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US1743539A
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US2106884A
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US2321190A
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US2326803A
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GB557795A
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US2362363A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |