US461439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve-operating mechanism for tanks
Assignee: —
•
Filing: —
•
Granted: 1891-10-20
•
Expires: 1908-10-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:47
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/18; F16K31/20; F16K31/24; F16K31/26; F16K31/265; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7381; Y10T137/7387; Y10T137/7391
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) | 1894-10-19 | 1895-04-20 | 1895-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1898-10-19 | 1899-04-20 | 1899-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1902-10-20 | 1903-04-21 | 1903-10-21 | $7700.00 | Window Closed / Lapsed |