US3322348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the treatment of metal melts with gases
Assignee: Dortmund Hoerder Huettenunion AG
•
Filing: 1964-12-30
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Granted: 1967-05-30
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Expires: 1984-12-30
Abstract
No abstract record available.
Inventors
- 👤 Vonnemann Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:51
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/4606
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
AN APPARATUS FOR THE TREATMENT OF A BATH OF MOLTEN METAL WITH A GAS, COMPRISING A BLAST PIPE WITH A CENTRAL VERTICAL AXIS ABOVE THE SURFACE OF SAID BATH, SAID PIPE HAVING AN UPPER PART WITH A CENTRAL BORE CONNECTED TO A SOURCE OF TREATMENT GAS UNDER PRESSURE; A PLURALITY OF DOWNWARDLY OPEN VERTICAL NOZZLE DUCTS WITH INDIVIDUAL AXES PARALLEL TO SAID CENTRAL VERTICAL AXIS IN A LOWER PART OF SAID PIPE ARRAYED AROUND SAID AXIS; AND CONDUIT MEANS CONNECTING SAID DUCTS WITH SAID BORE, EACH OF SAID DUCTS HAVING A BOTTOM OPENING FORMING AN OUTLET FOR SAID TREATMENT GAS, SAID OPENING BEING FORMED WITH A RELATIVELY LOW-LYING EDGE PORTION PROXIMAL TO SAID CENTRAL VERTICAL AXIS AND WITH A RELATIVELY HIGH-LYING EDGE PORTION REMOTE FROM SAID CENTRAL VERTICAL AXIS, THEREBY DEFINING A DISCHARGE PORT INCLINED AT AN ACUTE ANGLE TO ITS INDIVIDUAL AXIS.
Claim 2
Independent Claim
143 words
AN APPARATUS FOR THE TREATMENT OF A BATH OF MOLTEN METAL WITH A GAS, COMPRISING A BLAST PIPE WITH A CENTRAL VERTICAL AXIS ABOVE THE SURFACE OF SAID BATH, SAID PIPE HAVING AN UPPER PART WITH A CENTRAL BORE CONNECTED TO A SOURCE OF TREATMENT GAS UNDER PRESSURE; A PLURALITY OF DOWNWARDLY OPEN VERTICAL NOZZLE DUCTS WITH INDIVIDUAL AXES PARALLEL TO SAID CENTRAL VERTICAL AXIS IN A LOWER PART OF SAID PIPE ARRAYED AROUND SAID AXIS; AND CONDUIT MEANS CONNECTING SAID DUCTS WITH SAID BORE, EACH OF SAID DUCTS HAVING A BOTTOM OPENING FORMING AN OUTLET FOR SAID TREATMENT GAS, SAID OPENING BEING FORMED WITH A RELATIVELY LOW-LYING EDGE PORTION PROXIMAL TO SAID CENTRAL VERTICAL AXIS AND WITH A RELATIVELY HIGH-LYING EDGE PORTION REMOTE FROM SAID CENTRAL VERTICAL AXIS, THEREBY DEFINING A DISCHARGE PORT INCLINED AT AN ACUTE ANGLE TO ITS INDIVIDUAL AXIS.
References Cited (Backward Citations)
FR1060511A
Cited
US2807506A
Cited
US2978189A
Cited
AT216032B
Cited
GB872368A
Cited
US3082997A
Cited
US3020035A
Cited
FR1298188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |