US123546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in lock safety-valves for steam-boilers
Assignee: —
•
Filing: —
•
Granted: 1872-02-13
•
Expires: 1889-02-13
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:33
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/06; F16K15/063; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7923; Y10T137/7929; Y10T137/7939
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) | 1875-02-12 | 1875-08-14 | 1876-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1879-02-12 | 1879-08-14 | 1880-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1883-02-12 | 1883-08-14 | 1884-02-13 | $7700.00 | Window Closed / Lapsed |