US3215424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for refining iron
Assignee: Individual
•
Filing: 1961-11-13
•
Granted: 1965-11-02
•
Expires: 1981-11-13
Abstract
No abstract record available.
Inventors
- 👤 Kanamori Kuro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:48
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/56; C21C5/567; C21C1/00; C21C7/00; C21C7/0068
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE252046C
Cited
US724770A
Cited
US723501A
Cited
US1032653A
Cited
US879480A
Cited
US1034786A
Cited
US1946873A
Cited
US2611693A
Cited
US2603476A
Cited
US2862810A
Cited
GB744935A
Cited
US2975047A
Cited
US3015554A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |