US879480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for purifying iron.
Assignee: Individual
•
Filing: 1906-04-30
•
Granted: 1908-02-18
•
Expires: 1926-04-30
Abstract
No abstract record available.
Inventors
- 👤 Edmund Von Maltitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:46
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/30; C21C5/32
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) | 1911-02-17 | 1911-08-19 | 1912-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1915-02-17 | 1915-08-19 | 1916-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1919-02-17 | 1919-08-19 | 1920-02-18 | $7700.00 | Window Closed / Lapsed |