US152444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in magnetic safety or relief valves
Assignee: —
•
Filing: —
•
Granted: 1874-06-23
•
Expires: 1891-06-23
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:49
CPC Classifications
F; F16; F16K; F16K21/00; F16K21/04; Y; Y10; Y10T; Y10T137/00; Y10T137/1407
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) | 1877-06-22 | 1877-12-22 | 1878-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1881-06-22 | 1881-12-22 | 1882-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1885-06-22 | 1885-12-22 | 1886-06-23 | $7700.00 | Window Closed / Lapsed |