US2593564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pilot operated valve
Assignee: Alco Valve Co
•
Filing: 1944-11-16
•
Granted: 1952-04-22
•
Expires: 1964-11-16
Abstract
No abstract record available.
Inventors
- 👤 Clifford B Ives
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:02
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/12; G05D23/125; G05D23/126; G05D23/127; G05D23/128
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1311536A
Cited
US975283A
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US1567334A
Cited
DE604798C
Cited
CH169809A
Cited
US2264677A
Cited
US2304323A
Cited
US2312880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |