US2595775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic valve operating system
Assignee: Individual
•
Filing: 1947-07-26
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Granted: 1952-05-06
•
Expires: 1967-07-26
Abstract
No abstract record available.
Inventors
- 👤 Wrangell Serge De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:35
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/02; F01L1/04; F01L1/042; F01L1/30; F01L3/00; F01L3/10; F01L9/00; F01L9/10; F01L9/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-06 | 1955-11-05 | 1956-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-06 | 1959-11-05 | 1960-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-06 | 1963-11-05 | 1964-05-06 | $7700.00 | Window Closed / Lapsed |