US2956794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for blowing gases containing possibly pulverulent material into a bath of molten metal
Assignee: Institut de Recherches de la Siderurgie Francaise IRSID
•
Filing: 1956-07-03
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Granted: 1960-10-18
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Expires: 1976-07-03
Abstract
No abstract record available.
Inventors
- 👤 Allard Marc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:59
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/0037; B; B22; B22D; B22D1/00; B22D1/002; B22D1/005; C21C5/00; C21C5/28; C21C5/30; C21C5/34; C21C5/42
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |