US3706343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stave cooling device employing double-tubes
Assignee: IHI Corp
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Filing: 1971-06-04
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Granted: 1972-12-19
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Expires: 1991-06-04
Abstract
Abstract A stave cooling device wherein a double-drawn-steel-tube is cast into a main-body of castable metal, the outer surface of the outer tube of said double-tube being closely welded to said main body and the inner tube of said double-tube serving as the passage of the coolant.
Inventors
- 👤 Yoshinori Saiga
- 👤 Kazunori Mohri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:11
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/12; C; C21; C21B; C21B7/00; C21B7/10; F27D9/00; F27D2009/0002; F27D2009/0045; F27D2009/0048; F28; F28D; F28D21/00; F28D2021/0019; F28D2021/0056
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A stave cooling device employing double-tubes comprising a double-drawn-steel-tube inserted in a main body a of cast-steel, cast-iron or castable metal when said main body is cast, in such a manner that both ends (1) and (2) of said double-tube may extend out of said main body (a), the outer surface of the outer tube (b) of said double-tube being closely welded to said main body a when it is cast and the inner tube c of said double-tube serving as the passage of the coolant.
Claim 2
Dependent Claim
86 words
A stave cooling device employing double-tubes comprising a double-drawn-steel-tube inserted in a main body a of cast-steel, cast-iron or castable metal when said main body is cast, in such a manner that both ends (1) and (2) of said double-tube may extend out of said main body (a), the outer surface of the outer tube (b) of said double-tube being closely welded to said main body a when it is cast and the inner tube c of said double-tube serving as the passage of the coolant.
References Cited (Backward Citations)
US1090574A
Cited
US2743089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |