US3216714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating and blowing device for metallurgical purposes
Assignee: BOT Brassert Oxygen Technik AG
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Filing: 1963-02-04
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Granted: 1965-11-09
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Expires: 1983-02-04
Abstract
No abstract record available.
Inventors
- 👤 Eibl Josef
- 👤 Trefil Erich
- 👤 Jilek Walter
- 👤 Achatz Siegfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:06
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/4606
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A HEATING AND BLOWING DEVICE FOR TOP-BLOWING REFINING OF STEEL, COMPRISING A CENTRAL OXYGEN BLOWING TUBE HAVING A CONVERGENT-DIVERGENT END PORTION FORMING A DE LAVAL NOZZLE, A FUEL SUPPLY TUBE CONCENTRICALLY SURROUNDING AND SPACED RADIALLY FROM THE CENTRAL OXYGEN TUBE TO FORM AN ANNULAR SPACE BETWEEN SAID CENTRAL TUBE AND SAID FUEL SUPPLY TUBE, AN OUTER OXYGEN TUBE CONCENTRICALLY SURROUNDING AND RADIALLY SPACED FROM THE FUEL SUPPLY TUBE, SAID CENTRAL TUBE AND SAID FUEL SUPPLY TUBE HAVING OUTER ENDS DISPOSED INWARDLY OF THE OUTER END OF THE OUTER TUBE TO PROVIDE A MIXING CHAMBER WITHIN SAID OUTER TUBE, A REPLACEABLE ANNULAR INSERT SPANNING SAID ANNULAR SPACE BETWEEN THE OUTER ENDS OF SAID CENTRAL
Claim 2
Dependent Claim
113 words
A HEATING AND BLOWING DEVICE FOR TOP-BLOWING REFINING OF STEEL, COMPRISING A CENTRAL OXYGEN BLOWING TUBE HAVING A CONVERGENT-DIVERGENT END PORTION FORMING A DE LAVAL NOZZLE, A FUEL SUPPLY TUBE CONCENTRICALLY SURROUNDING AND SPACED RADIALLY FROM THE CENTRAL OXYGEN TUBE TO FORM AN ANNULAR SPACE BETWEEN SAID CENTRAL TUBE AND SAID FUEL SUPPLY TUBE, AN OUTER OXYGEN TUBE CONCENTRICALLY SURROUNDING AND RADIALLY SPACED FROM THE FUEL SUPPLY TUBE, SAID CENTRAL TUBE AND SAID FUEL SUPPLY TUBE HAVING OUTER ENDS DISPOSED INWARDLY OF THE OUTER END OF THE OUTER TUBE TO PROVIDE A MIXING CHAMBER WITHIN SAID OUTER TUBE, A REPLACEABLE ANNULAR INSERT SPANNING SAID ANNULAR SPACE BETWEEN THE OUTER ENDS OF SAID CENTRAL
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |