US2552261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump for aerating water
Assignee: Individual
•
Filing: 1947-06-28
•
Granted: 1951-05-08
•
Expires: 1967-06-28
Abstract
No abstract record available.
Inventors
- 👤 Earl A Coughlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:04
CPC Classifications
F; F04; F04B; F04B9/00; F04B9/08; F04B9/12; F04B9/1207; F04B9/1215; A; A01; A01K; A01K63/00; A01K63/04; A01K63/042; F04B45/00; F04B45/04; F04B45/053; F04B45/0536
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US299765A
Cited
DE585168C
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US1073353A
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US1117982A
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US1337563A
Cited
US1604971A
Cited
US1912203A
Cited
US2079858A
Cited
US2233564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |