US51037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in governor-valves
Assignee: —
•
Filing: —
•
Granted: 1865-11-21
•
Expires: 1882-11-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:56
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/44; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86759; Y10T137/86767
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) | 1868-11-20 | 1869-05-22 | 1869-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1872-11-20 | 1873-05-22 | 1873-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1876-11-20 | 1877-05-22 | 1877-11-21 | $7700.00 | Window Closed / Lapsed |