US2529387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing bessemer steel
Assignee: Stora Enso Oyj
•
Filing: 1947-08-08
•
Granted: 1950-11-07
•
Expires: 1967-08-08
Abstract
No abstract record available.
Inventors
- 👤 Haglund Ture Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:34
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/30; C21C5/34
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
79 words
IN THE PROCESS FOR THE MANUFACTURE OF IRON OR STEEL FROM PIG IRON BY BESSEMER BLOWING CONSISTING IN BLOWING WITH A BLAST ESSENTIALLY CONSISTING OF AIR DURING THE OXIDIZING OF A SUBSTANTIAL PORTION OF THE CARBON CONTENT OF THE PIG IRON, AND THEREAFTER BLOWING WITH A BLAST ESSENTIALLY CONSISTING BY VOLUME OF AT LEAST 20% CARBON DIOXIDE, AT LEAST 20% OXYGEN AND LESS THAN 10% NITROGEN WITH THE CARBON DIOXIDE AND OXYGEN FORMING AT LEAST 90% OF SAID BLAST.
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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) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |