US425570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High and low water alarm for boilers
Assignee: —
•
Filing: —
•
Granted: 1890-04-15
•
Expires: 1907-04-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:19
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/0007; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3143; Y10T137/3146; Y10T137/7287; Y10T137/7358; Y10T137/7368; Y10T137/742
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) | 1893-04-14 | 1893-10-14 | 1894-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1897-04-14 | 1897-10-14 | 1898-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1901-04-15 | 1901-10-15 | 1902-04-16 | $7700.00 | Window Closed / Lapsed |