US618904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-relief valve
Assignee: —
•
Filing: —
•
Granted: 1899-02-07
•
Expires: 1916-02-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:02
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/02; E03C1/10; Y; Y10; Y10T; Y10T137/00; Y10T137/3149; Y10T137/3185; Y10T137/3294; Y10T137/7287; Y10T137/7358; Y10T137/7407; Y10T137/741; Y10T137/7439; Y10T137/7475; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7932; Y10T137/7933
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) | 1902-02-07 | 1902-08-09 | 1903-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1906-02-07 | 1906-08-09 | 1907-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1910-02-07 | 1910-08-09 | 1911-02-08 | $7700.00 | Window Closed / Lapsed |