US461235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for feeding chemicals to filters
Assignee: —
•
Filing: —
•
Granted: 1891-10-13
•
Expires: 1908-10-13
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:52
CPC Classifications
A; A01; A01C; A01C23/00; A01C23/04; A01C23/042; B; B01; B01F; B01F25/00; B01F25/30; B01F25/31; B01F25/316; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86726; Y10T137/86863; Y10T137/86871; Y10T137/87265; Y10T137/87338; Y10T137/87346
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) | 1894-10-12 | 1895-04-13 | 1895-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1898-10-12 | 1899-04-13 | 1899-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1902-10-13 | 1903-04-14 | 1903-10-14 | $7700.00 | Window Closed / Lapsed |