US3417463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing steel for sheets to be enamelled by the single-coat method
Assignee: Eisenwerke Gesellschaf Maximilianshuette mbH
•
Filing: 1966-07-05
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Granted: 1968-12-24
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Expires: 1986-07-05
Abstract
No abstract record available.
Inventors
- 👤 Knuppel Helmut
- 👤 Brotzmann Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:57
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49988; Y10T29/49991
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A METHOD OF PRODUCING STEEL FOR SHEETS TO BE ENAMELLED BY THE SINGLE-COAT METHOD, WHICH COMPRISES THE STEPS OF (A) PRODUCING BY A REFINING PROCESS A STEEL HAVING A COMPOSITION WHICH HAS A RELATIVELY HIGH OXYGEN CONTENT OF ABOUT 0.10 TO 1.12% WITH A CARBON CONTENT OF 0.03 TO 0.06% THEREAFTER (B) TREATING THE STEEL MELT TO REDUCE ITS CARBON CONTENT TO BELOW ABOUT 0.01%, (C) SUBJECTING THE STEEL TO A DEOXIDATION TREATMENT IN VACUO TO REDUCE THE OXYGEN CONTENT TO A PREDETERMINED LEVEL, (D) VIGOROUSLY MIXING THE STEEL IN VACUO, (E) POURING THE STEEL TO PRODUCE SLABS, AND (F) ROLLING THE SLABS INTO SHEETS.
Claim 2
Independent Claim
105 words
A METHOD OF PRODUCING STEEL FOR SHEETS TO BE ENAMELLED BY THE SINGLE-COAT METHOD, WHICH COMPRISES THE STEPS OF (A) PRODUCING BY A REFINING PROCESS A STEEL HAVING A COMPOSITION WHICH HAS A RELATIVELY HIGH OXYGEN CONTENT OF ABOUT 0.10 TO 1.12% WITH A CARBON CONTENT OF 0.03 TO 0.06% THEREAFTER (B) TREATING THE STEEL MELT TO REDUCE ITS CARBON CONTENT TO BELOW ABOUT 0.01%, (C) SUBJECTING THE STEEL TO A DEOXIDATION TREATMENT IN VACUO TO REDUCE THE OXYGEN CONTENT TO A PREDETERMINED LEVEL, (D) VIGOROUSLY MIXING THE STEEL IN VACUO, (E) POURING THE STEEL TO PRODUCE SLABS, AND (F) ROLLING THE SLABS INTO SHEETS.
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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) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |