US2599566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chrome-magnesia refractories
Assignee: Saint Gobain Ceramics and Plastics Inc
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Filing: 1951-06-27
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Granted: 1952-06-10
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Expires: 1971-06-27
Abstract
No abstract record available.
Inventors
- 👤 Jr Ralph Joseph Magri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:40
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/42; C04B35/12; C04B35/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A FUSED REFRACTORY MATERIAL COMPRISING A CHROME-CONTAINING SPINEL AND A CRYSTALLINE SOLID SOLUTION OF FERROUS OXIDE IN MAGNESIUM OXIDE, SAID REFRACTORY MATERIAL ANALYTICALLY CONTAINING 5 TO 25% FEO, 25 TO 78% MGO, 5 TO 25% AL2O3, AND 12 TI 50% CR2O3, THE TOTAL OF SUCH OXIDES AMOUNTING TO AT LEAST 82%, THE RATIO OF THE MOLS OF FEO AND MGO TO THE MOLS OF AL2O3 AND CR2O3 BEING AT LEAST 2.2.
Claim 2
Dependent Claim
71 words
A FUSED REFRACTORY MATERIAL COMPRISING A CHROME-CONTAINING SPINEL AND A CRYSTALLINE SOLID SOLUTION OF FERROUS OXIDE IN MAGNESIUM OXIDE, SAID REFRACTORY MATERIAL ANALYTICALLY CONTAINING 5 TO 25% FEO, 25 TO 78% MGO, 5 TO 25% AL2O3, AND 12 TI 50% CR2O3, THE TOTAL OF SUCH OXIDES AMOUNTING TO AT LEAST 82%, THE RATIO OF THE MOLS OF FEO AND MGO TO THE MOLS OF AL2O3 AND CR2O3 BEING AT LEAST 2.2.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-10 | 1955-12-10 | 1956-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-10 | 1959-12-10 | 1960-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-10 | 1963-12-10 | 1964-06-10 | $7700.00 | Window Closed / Lapsed |