US27025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in the process of manufacturing steel
Assignee: —
•
Filing: —
•
Granted: 1860-01-31
•
Expires: 1877-01-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:33
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/60; C23C8/62; C23C8/64; C23C8/66
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) | 1863-01-30 | 1863-08-01 | 1864-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1867-01-30 | 1867-08-01 | 1868-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1871-01-30 | 1871-08-01 | 1872-01-31 | $7700.00 | Window Closed / Lapsed |