US2455747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve control for fluid levels in hydraulic power plants
Assignee: Chicago Pneumatic Tool Co LLC
•
Filing: 1944-10-21
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Granted: 1948-12-07
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Expires: 1964-10-21
Abstract
No abstract record available.
Inventors
- 👤 Howard R Fischer
- 👤 Edward W Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:07
CPC Classifications
B; B21; B21J; B21J15/00; B21J15/10; B21J15/16; B21J15/22; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7439; Y10T137/8593; Y10T137/85978; Y10T137/86035; Y10T137/86059; Y10T137/86187; Y10T137/86212
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2232198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-07 | 1952-06-07 | 1952-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-07 | 1956-06-07 | 1956-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-07 | 1960-06-07 | 1960-12-07 | $7700.00 | Window Closed / Lapsed |