Patent US2832683A successfully refreshed from Google Patents.
US2832683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for operating a melting shaft furnace
Assignee: Buderus AG
•
Filing: 1954-02-09
•
Granted: 1958-04-29
•
Expires: 1974-02-09
Abstract
No abstract record available.
Inventors
- 👤 Stockkamp Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:03
CPC Classifications
C; C21; C21C; C21C1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS FOR PRODUCING CAST IRON OF A SILICON CONTENT OF ABOUT 2%, WHICH COMPRISES MAKING UP AN IRONSILICON CHARGE ADJUSTED TO 1.8 KGS. SI PER 100 KGS. OF IRON, INTRODUCING THE CHARGE THUS ADJSTED INTO A FURNACE WITH AN ACID LINING, PREHEATING THE BLAST ADMITTED TO THE FURNACE TO A TEMPERATURE OF APPROXIMATELY 500*C., WHILE MAINTAINING A SLAG FORMED AT A SUBSTANTIALLY CONSTANT HEIGHT OF 250 MM. IN THE FURNACE, THE SLAG BEING OF A RATIO OF LIME, SILICIC ACID 0.7, AND COMPENSATING FOR THE LOW AMOUNT OF SILICON IN THE INITIAL CHARGE BY INTRODUCING ADDITIONAL SILICON FROM SAID SLAG INTO THE IRON MELT.
Claim 2
Dependent Claim
105 words
A PROCESS FOR PRODUCING CAST IRON OF A SILICON CONTENT OF ABOUT 2%, WHICH COMPRISES MAKING UP AN IRONSILICON CHARGE ADJUSTED TO 1.8 KGS. SI PER 100 KGS. OF IRON, INTRODUCING THE CHARGE THUS ADJSTED INTO A FURNACE WITH AN ACID LINING, PREHEATING THE BLAST ADMITTED TO THE FURNACE TO A TEMPERATURE OF APPROXIMATELY 500*C., WHILE MAINTAINING A SLAG FORMED AT A SUBSTANTIALLY CONSTANT HEIGHT OF 250 MM. IN THE FURNACE, THE SLAG BEING OF A RATIO OF LIME, SILICIC ACID 0.7, AND COMPENSATING FOR THE LOW AMOUNT OF SILICON IN THE INITIAL CHARGE BY INTRODUCING ADDITIONAL SILICON FROM SAID SLAG INTO THE IRON MELT.
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) | 1961-04-28 | 1961-10-28 | 1962-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-28 | 1965-10-28 | 1966-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-28 | 1969-10-28 | 1970-04-29 | $7700.00 | Window Closed / Lapsed |