US607875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing magnetic oxid of iron
Assignee: —
•
Filing: —
•
Granted: 1898-07-26
•
Expires: 1915-07-26
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:20
CPC Classifications
C; C01; C01G; C01G49/00; C01G49/02; C01G49/08; C01P; C01P2004/00; C01P2004/60; C01P2004/62
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1901-07-26 | 1902-01-25 | 1902-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1905-07-26 | 1906-01-25 | 1906-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1909-07-26 | 1910-01-25 | 1910-07-27 | $7700.00 | Window Closed / Lapsed |