US168192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in air-valves for pumps
Assignee: —
•
Filing: —
•
Granted: 1875-09-28
•
Expires: 1892-09-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:44
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/06; F16K15/063; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/7915; Y10T137/7917; Y10T137/7922; Y10T137/7929; Y10T137/7932
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1878-09-27 | 1879-03-29 | 1879-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1882-09-27 | 1883-03-29 | 1883-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1886-09-27 | 1887-03-29 | 1887-09-28 | $7700.00 | Window Closed / Lapsed |