US3426833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of steel ingots
Assignee: Individual
•
Filing: 1964-11-12
•
Granted: 1969-02-11
•
Expires: 1984-11-12
Abstract
No abstract record available.
Inventors
- 👤 Alfred Randak
- 👤 Reinhold Eberbach
- 👤 Heinz Rinker
- 👤 Helmut Treppschub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:09
CPC Classifications
B; B22; B22D; B22D27/00; B22D27/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS FOR THE MANUFACTURE OF STEEL INGOTS HAVING A HIGHT DEGREE OF PURITY, WHICH COMPRISES POURING MOLTEN STEEL IN A SUBSTANTIALLY KILLED CONDITION INTO AN IGNOT MOLD, AND ADDING A SLAG MATERIAL IN A DIVIDED SOLID CONDITION TO SAID MOLTEN STEEL FOR INTIMATE CONTACT THEREWITH TO REACT WITH NON-METALLIC IMPURITIES THEREIN AND TO COOL SAID MOLTEN STEEL TO SEPARATE SUCH IMPURITIES FROM THE MOLTEN STEEL WITHIN THE FLOATATION WITH THE SLAG, SAID
Claim 2
Dependent Claim
73 words
A PROCESS FOR THE MANUFACTURE OF STEEL INGOTS HAVING A HIGHT DEGREE OF PURITY, WHICH COMPRISES POURING MOLTEN STEEL IN A SUBSTANTIALLY KILLED CONDITION INTO AN IGNOT MOLD, AND ADDING A SLAG MATERIAL IN A DIVIDED SOLID CONDITION TO SAID MOLTEN STEEL FOR INTIMATE CONTACT THEREWITH TO REACT WITH NON-METALLIC IMPURITIES THEREIN AND TO COOL SAID MOLTEN STEEL TO SEPARATE SUCH IMPURITIES FROM THE MOLTEN STEEL WITHIN THE FLOATATION WITH THE SLAG, SAID
References Cited (Backward Citations)
US963973A
Cited
US1008420A
Cited
US1145506A
Cited
US1559342A
Cited
US1646728A
Cited
US1814584A
Cited
US2015691A
Cited
US2040167A
Cited
GB492896A
Cited
US2204813A
Cited
US2305052A
Cited
US2510154A
Cited
US2510155A
Cited
US2518738A
Cited
US2493394A
Cited
US2631344A
Cited
US2741556A
Cited
US2767077A
Cited
US2781256A
Cited
GB755863A
Cited
GB801156A
Cited
US3052936A
Cited
US2983598A
Cited
US3089767A
Cited
US3208117A
Cited
DE1198499B
Cited
DE1211362B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |