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US185975A
Expired / Lapsed
US
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Improvement in relief-valves for hydraulic machines
Assignee: —
•
Filing: —
•
Granted: 1877-01-02
•
Expires: 1894-01-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:55
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/12; Y; Y10; Y10T; Y10T137/00; Y10T137/7287
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1880-01-02 | 1880-07-03 | 1881-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1884-01-02 | 1884-07-03 | 1885-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1888-01-02 | 1888-07-03 | 1889-01-02 | $7700.00 | Window Closed / Lapsed |