US163458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in vent-valves
Assignee: —
•
Filing: —
•
Granted: 1875-05-18
•
Expires: 1892-05-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:04
CPC Classifications
F; F16; F16K; F16K24/00; F16K24/04; F16K24/042; F16K24/044; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3084; Y10T137/309; Y10T137/3099; Y10T137/7287; Y10T137/7358
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) | 1878-05-17 | 1878-11-16 | 1879-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1882-05-17 | 1882-11-16 | 1883-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1886-05-17 | 1886-11-16 | 1887-05-18 | $7700.00 | Window Closed / Lapsed |