US2706152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sulphur removing from pig iron
Assignee: CARNEGIE INST
•
Filing: 1952-07-08
•
Granted: 1955-04-12
•
Expires: 1972-07-08
Abstract
No abstract record available.
Inventors
- 👤 Derge Gerhard
- 👤 Kenneth M Goldman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:06
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
58 words
THE METHOD OF CONTINUOUSLY REMOVING SULPHUR FROM MOLTEN PIG IRON AT THE BLAST FURNACE COMPRISING THE STEPS OF TAPPING MOLTEN METAL AND ACCOMPANYING SLAG FROM THE BLAST FURNACE INTO A SKIMMER, SUBSTANTIALLY CONTINUOUSLY ADDING METALLIC ALUMINUM TO THE MOLTEN METAL AND SLAG BEFORE THE SKIMMER, AND CONTINUOUSLY SEPARATING THE SLAG FROM THE METAL AFTER THE ADDITION OF ALUMINUM.
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) | 1958-04-11 | 1958-10-11 | 1959-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-11 | 1962-10-11 | 1963-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-11 | 1966-10-11 | 1967-04-12 | $7700.00 | Window Closed / Lapsed |