US180460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in relief-valves for air-brakes
Assignee: —
•
Filing: —
•
Granted: 1876-08-01
•
Expires: 1893-08-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:21
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/16; B65D88/1612; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/6855; Y10T137/6866; Y10T137/7722; Y10T137/7781; Y10T137/7832; Y10T137/7837; Y10T137/7838; Y10T137/7846
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) | 1879-08-01 | 1880-01-31 | 1880-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1883-08-01 | 1884-01-31 | 1884-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1887-08-01 | 1888-01-31 | 1888-08-01 | $7700.00 | Window Closed / Lapsed |