US3241825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blowing device
Assignee: BOT Brassert Oxygen Technik AG
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Filing: 1962-07-18
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Granted: 1966-03-22
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Expires: 1982-07-18
Abstract
No abstract record available.
Inventors
- 👤 Jilek Walter
- 👤 Truppe Meinhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:27
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/4606
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A BLOWING DEVICE FOR SUPPLYING AN OXYGEN-CONTAINING REFINING GAS AND ADMIXTURES IN SURFACE-BLOWING PROCESSES, COMPRISING A BLAST TUBE TERMINATING IN A CONVERGENTDIVERGENT NOZZLE AND A DOWNCOMER CONCENTRICALLY SURROUNDING THE BLAST TUBE TO PROVIDE FOR AN ANNULAR SPACE, SAID BLAST TUBE BEING ADAPTED TO BE LIFTED AND LOWERED WITHIN SAID DOWNCOMER, SAID BLAST TUBE SERVING FOR THE SUPPLY OF THE REFINING GAS AND SAID ANNULAR SPACE BETWEEN SAID BLAST TUBE AND SAID DOWNCOMER SERVING FOR THE SUPPLY OF ADMIXTURES IN THE LIFTED POSITION OF SAID BLAST TUBE, SAID DOWNCOMER INCLUDING A DOWNWARDLY AND INWARDLY SHAPED PORTION ADJACENT THE MOUTH PORTION OF THE DOWNCOMER ADAPTED TO DIRECT THE ADMIXTURES INTO THE REFINING GAS SUPPLIED FROM THE NOZZLE OF THE BLAST TUBE, THE MOUTH PORTION OF THE BLAST TUBE BEING SHAPED TO FORM A FITTING PART ADAPTED TO BE INSERTED INTO THE MOUTH PORTION OF THE DOWNCOMER, WHICH FORMS A SEAT PART, THE ANNULAR SPACE BEING CLOSED WHEN THE BLAST TUBE IS IN THE LOWERED POSITION.
Claim 2
Dependent Claim
163 words
A BLOWING DEVICE FOR SUPPLYING AN OXYGEN-CONTAINING REFINING GAS AND ADMIXTURES IN SURFACE-BLOWING PROCESSES, COMPRISING A BLAST TUBE TERMINATING IN A CONVERGENTDIVERGENT NOZZLE AND A DOWNCOMER CONCENTRICALLY SURROUNDING THE BLAST TUBE TO PROVIDE FOR AN ANNULAR SPACE, SAID BLAST TUBE BEING ADAPTED TO BE LIFTED AND LOWERED WITHIN SAID DOWNCOMER, SAID BLAST TUBE SERVING FOR THE SUPPLY OF THE REFINING GAS AND SAID ANNULAR SPACE BETWEEN SAID BLAST TUBE AND SAID DOWNCOMER SERVING FOR THE SUPPLY OF ADMIXTURES IN THE LIFTED POSITION OF SAID BLAST TUBE, SAID DOWNCOMER INCLUDING A DOWNWARDLY AND INWARDLY SHAPED PORTION ADJACENT THE MOUTH PORTION OF THE DOWNCOMER ADAPTED TO DIRECT THE ADMIXTURES INTO THE REFINING GAS SUPPLIED FROM THE NOZZLE OF THE BLAST TUBE, THE MOUTH PORTION OF THE BLAST TUBE BEING SHAPED TO FORM A FITTING PART ADAPTED TO BE INSERTED INTO THE MOUTH PORTION OF THE DOWNCOMER, WHICH FORMS A SEAT PART, THE ANNULAR SPACE BEING CLOSED WHEN THE BLAST TUBE IS IN THE LOWERED POSITION.
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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |