Patent US2617446A successfully refreshed from Google Patents.
US2617446A
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Irrigation valve
Assignee: Valley Concrete Pipe & Product
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Filing: 1951-05-16
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Granted: 1952-11-11
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Expires: 1971-05-16
Abstract
No abstract record available.
Inventors
- 👤 Gilbert D Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:22
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US656581A
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US763187A
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US989920A
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US1036674A
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US1220296A
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US1287189A
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US1399434A
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US1674074A
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US1875857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |