US2785661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic mechanism valve
Assignee: Individual
•
Filing: 1954-03-31
•
Granted: 1957-03-19
•
Expires: 1974-03-31
Abstract
No abstract record available.
Inventors
- 👤 Celestinus J Stefan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:14
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/08; F15B11/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US506565A
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US1938758A
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US2018215A
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US2321423A
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US2298457A
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US2302232A
Cited
US2617257A
Cited
US2619938A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-18 | 1960-09-17 | 1961-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-18 | 1964-09-17 | 1965-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-18 | 1968-09-17 | 1969-03-19 | $7700.00 | Window Closed / Lapsed |