US2801596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-cylinder pump
Assignee: Individual
•
Filing: 1954-03-31
•
Granted: 1957-08-06
•
Expires: 1974-03-31
Abstract
No abstract record available.
Inventors
- 👤 Sewell Ronald Percival
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:00
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/22; F04B49/24; F04B1/00; F04B1/04; F04B1/0404; F04B1/0421; F04B1/0426; F04B1/053
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US516840A
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US1274955A
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US1409786A
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GB178672A
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US1466230A
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US2058591A
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US2121120A
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US2345125A
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US2471939A
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US2522890A
Cited
US2456651A
Cited
US2621607A
Cited
US2679808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-05 | 1961-02-04 | 1961-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-05 | 1965-02-04 | 1965-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-05 | 1969-02-04 | 1969-08-06 | $7700.00 | Window Closed / Lapsed |