US2811346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for insufflating gas into a mass of molten metal
Assignee: LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
•
Filing: 1952-01-21
•
Granted: 1957-10-29
•
Expires: 1972-01-21
Abstract
No abstract record available.
Inventors
- 👤 Spire Etienne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:56
CPC Classifications
B; B22; B22D; B22D1/00; B22D1/002; B22D1/005; C; C21; C21C; C21C5/00; C21C5/28; C21C5/30; C21C5/34
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |