US44906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in roasting and desulphurizing ores
Assignee: —
•
Filing: —
•
Granted: 1864-11-01
•
Expires: 1881-11-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:07
CPC Classifications
F; F23; F23G; F23G7/00; F23G7/06; F23G7/061; F23G7/065
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) | 1867-11-01 | 1868-05-02 | 1868-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1871-11-01 | 1872-05-02 | 1872-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1875-11-01 | 1876-05-02 | 1876-11-01 | $7700.00 | Window Closed / Lapsed |