Patent US2561296A successfully refreshed from Google Patents.
US2561296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-draining irrigation we
Assignee: —
•
Filing: —
•
Granted: 1951-07-17
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Expires: 1968-07-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:05
CPC Classifications
F; F16; F16K; F16K15/00; A; A01; A01G; A01G25/00; A01G25/02; F16K15/18; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/2557; Y10T137/2713; Y10T137/2917; Y10T137/8593; Y10T137/877; Y10T137/87829; Y10T137/87837
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-16 | 1955-01-15 | 1955-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-16 | 1959-01-15 | 1959-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-16 | 1963-01-15 | 1963-07-17 | $7700.00 | Window Closed / Lapsed |