US3341188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory-lined blast furnace tuyere
Assignee: Interlake Steel Corp
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Filing: 1965-06-03
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Granted: 1967-09-12
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Expires: 1985-06-03
Abstract
No abstract record available.
Inventors
- 👤 Frank K Armour
- 👤 Robert E Touzalin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:21
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A TUYERE COMPRISING, A SLEEVE-LIKE MEMBER HAVING INNER AND OUTER SIDE WALLS DEFINING A COOLING CHAMBER THEREBETWEEN, SAID INNER WALL DEFINING AN AXIALLY EXTENDING BLAST PASSAGEWAY THROUGH THE TUYERE, SAID INNER WALL HAVING AN INTERIOR CIRCUMFERENTIAL RECESS THEREIN EXTENDING FOR A MAJOR PORTION OF THE LENGTH OF SAID BLAST PASSAGEWAY, INSULATING MEANS DISPOSED IN SAID RECESS SO AS NOT TO PROJECT OUT INTO SAID PASSAGEWAY PAST THE OTHER DEFINING SURFACES OF SAID PASSAGEWAY, SAID INSULATING MEANS BEING RECESSED RADIALLY FROM SAID OTHER DEFINING SURFACES OF SAID PASSAGEWAY AND INCLUDING A METALLIC LINER DISPOSED IN SAID RECESS RADIALLY INWARDLY WITH RESPECT TO SAID INSULATING MEANS, SAID LINER BEING GENERALLY FLUSHED WITH SAID OTHER DEFINING SURFACES OF SAID PASSAGEWAY SO AS NOT TO INTERFERE WITH THE BLAST CHARACTERISTICS OF THE TUYERE, AND INCLUDING OPENING MEANS IN SAID LINER, CLOSURE MEANS INSERTED IN SAID OPENING MEANS, AND MEANS ATTACHING SAID CLOSURE MEANS TO THE REMAINDER OF THE LINER.
Claim 2
Dependent Claim
155 words
A TUYERE COMPRISING, A SLEEVE-LIKE MEMBER HAVING INNER AND OUTER SIDE WALLS DEFINING A COOLING CHAMBER THEREBETWEEN, SAID INNER WALL DEFINING AN AXIALLY EXTENDING BLAST PASSAGEWAY THROUGH THE TUYERE, SAID INNER WALL HAVING AN INTERIOR CIRCUMFERENTIAL RECESS THEREIN EXTENDING FOR A MAJOR PORTION OF THE LENGTH OF SAID BLAST PASSAGEWAY, INSULATING MEANS DISPOSED IN SAID RECESS SO AS NOT TO PROJECT OUT INTO SAID PASSAGEWAY PAST THE OTHER DEFINING SURFACES OF SAID PASSAGEWAY, SAID INSULATING MEANS BEING RECESSED RADIALLY FROM SAID OTHER DEFINING SURFACES OF SAID PASSAGEWAY AND INCLUDING A METALLIC LINER DISPOSED IN SAID RECESS RADIALLY INWARDLY WITH RESPECT TO SAID INSULATING MEANS, SAID LINER BEING GENERALLY FLUSHED WITH SAID OTHER DEFINING SURFACES OF SAID PASSAGEWAY SO AS NOT TO INTERFERE WITH THE BLAST CHARACTERISTICS OF THE TUYERE, AND INCLUDING OPENING MEANS IN SAID LINER, CLOSURE MEANS INSERTED IN SAID OPENING MEANS, AND MEANS ATTACHING SAID CLOSURE MEANS TO THE REMAINDER OF THE LINER.
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) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |