US2741554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of refining iron
Assignee: Individual
•
Filing: 1955-08-26
•
Granted: 1956-04-10
•
Expires: 1975-08-26
Abstract
No abstract record available.
Inventors
- 👤 Rinesch Rudolf Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:40
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)
US1032653A
Cited
US1338655A
Cited
GB496545A
Cited
GB615611A
Cited
GB546020A
Cited
GB685326A
Cited
GB700255A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-10 | 1959-10-10 | 1960-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-10 | 1963-10-10 | 1964-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-10 | 1967-10-10 | 1968-04-10 | $7700.00 | Window Closed / Lapsed |