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US2646261A
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US
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Device which aerates water
Assignee: Individual
•
Filing: 1950-06-23
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Granted: 1953-07-21
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Expires: 1970-06-23
Abstract
No abstract record available.
Inventors
- 👤 Eugene M Poirot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:46
CPC Classifications
F; F04; F04D; F04D33/00; A; A01; A01K; A01K63/00; A01K63/04; A01K63/042; B; B01; B01F; B01F31/00; B01F31/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US453998A
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US490508A
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US671516A
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US862856A
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US1208862A
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US1704026A
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US1705162A
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US1716960A
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US2092353A
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US2505423A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |