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US29909A
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US
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Improved method of converting iron into steel
Assignee: Individual
•
Filing: —
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Granted: 1860-09-04
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Expires: 1877-09-04
Abstract
No abstract record available.
Inventors
- 👤 Ebenezer G Pomeroy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:30
CPC Classifications
C; C21; C21C; C21C1/00; C21C5/00; C21C5/28; C21C7/00; C21C7/04; C21C7/076; Y; Y02; Y02P; Y02P10/00; Y02P10/20
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) | 1863-09-04 | 1864-03-05 | 1864-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1867-09-04 | 1868-03-05 | 1868-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1871-09-04 | 1872-03-05 | 1872-09-04 | $7700.00 | Window Closed / Lapsed |