US3098740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the refining of pig iron in other than round vessels
Assignee: Kloeckner Werke AG
•
Filing: 1960-08-01
•
Granted: 1963-07-23
•
Expires: 1980-08-01
Abstract
No abstract record available.
Inventors
- 👤 Hardt Paul Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:35
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/30; C21C5/32; C21C5/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A PROCESS FOR THE REFINING OF PIG IRON COMPRISING: PROVIDING A NON-ROUND REFINING VESSEL HAVING A MINOR AXIS TO MAJOR AXIS RATIO OF FROM 1:2 TO 1:5, CHARGING THE VESSEL WITH MATERIAL TO BE REFINED, ROTATING THE REFINING VESSEL ABOUT ITS LONGITUDINAL AXIS AT A SPEED LYING IN THE RANGE OF 16 TO 34 REVOLUTIONS PER MINUTE AND SUPPLYING OXYGEN TO THE VESSEL AT A PRESSURE OF ABOUT 6 ATMOSPHERES AND AT A RATE BETWEEN 4 TO 10 NM.3 PER MINUTE PER TON OF PIG IRON.
Claim 2
Dependent Claim
86 words
A PROCESS FOR THE REFINING OF PIG IRON COMPRISING: PROVIDING A NON-ROUND REFINING VESSEL HAVING A MINOR AXIS TO MAJOR AXIS RATIO OF FROM 1:2 TO 1:5, CHARGING THE VESSEL WITH MATERIAL TO BE REFINED, ROTATING THE REFINING VESSEL ABOUT ITS LONGITUDINAL AXIS AT A SPEED LYING IN THE RANGE OF 16 TO 34 REVOLUTIONS PER MINUTE AND SUPPLYING OXYGEN TO THE VESSEL AT A PRESSURE OF ABOUT 6 ATMOSPHERES AND AT A RATE BETWEEN 4 TO 10 NM.3 PER MINUTE PER TON OF PIG IRON.
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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) | 1966-07-22 | 1967-01-21 | 1967-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-22 | 1971-01-21 | 1971-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-22 | 1975-01-21 | 1975-07-23 | $7700.00 | Window Closed / Lapsed |