US101814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in automatic relief-valves
Assignee: —
•
Filing: —
•
Granted: 1870-04-12
•
Expires: 1887-04-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:09
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/0433; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7925
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) | 1873-04-11 | 1873-10-11 | 1874-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1877-04-11 | 1877-10-11 | 1878-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1881-04-11 | 1881-10-11 | 1882-04-12 | $7700.00 | Window Closed / Lapsed |