US4431745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon-bonded magnesia carbon bricks
Assignee: Krosaki Harima Corp
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Filing: 1982-05-17
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Granted: 1984-02-14
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Expires: 2002-05-17
Abstract
Abstract The invention relates to carbon-bonded magnesia carbon bricks for use in converters, ladles, ladle refinery, mixing cars, mixing furnaces, etc., and the method for obtaining such carbon-bonded magnesia carbon bricks having high properties in respect of resistance to thermal and structural spalling, slag resistance, thermal strength, shock resistance, etc. thereby enabling to conform to the gradually intensified operational conditions of said converters and the like by means of 60-97 weight % sintered magnesia clinker of bulk specific gravity above 3.40, 3-40 weight % carbonaceous material and a carbon-bonding formative agent.
Inventors
- 👤 Akira Watanabe
- 👤 Takeo Okamura
- 👤 Goji Saeki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:13
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/013
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
33 words
Carbon-bonded magnesia carbon bricks characterized in that said bricks comprise 60-97 weight % sintered magnesia clinker of bulk specific gravity above 3.40, 3-40 weight % carbonaceous material and a carbon bonding formative agent.
Claim 2
Dependent Claim
33 words
Carbon-bonded magnesia carbon bricks characterized in that said bricks comprise 60-97 weight % sintered magnesia clinker of bulk specific gravity above 3.40, 3-40 weight % carbonaceous material and a carbon bonding formative agent.
Claim 3
Dependent Claim
21 words
Carbon-bonded magnesia carbon bricks according to claim 1 wherein the sintered magnesia clinker contains MgO in excess of 96 weight %.
References Cited (Backward Citations)
US3236664A
Cited
US4130438A
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US4238121A
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US4210453A
Cited
US4306030A
Cited
JPS5684371A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-13 | 1987-08-15 | 1988-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-13 | 1991-08-15 | 1992-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-13 | 1995-08-15 | 1996-02-14 | $7700.00 | Window Closed / Lapsed |