Patent US4726280A successfully refreshed from Google Patents.
Patent US3132954A successfully refreshed from Google Patents.
US3132954A
Expired / Lapsed
US
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Fused cast refractory and method of making
Assignee: Cohart Refractories Co
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Filing: 1961-07-28
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Granted: 1964-05-12
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Expires: 1981-07-28
Abstract
No abstract record available.
Inventors
- 👤 Allen M Alper
- 👤 Robert N Mcnally
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:01
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/42; C04B35/12; C04B35/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
THE PROCESS FOR PREVENTING CRACKING OF FUSED CAST CHROME-MAGNESIA REFRACTORY DURING COOLING IN THE MOLD WHICH COMPRISES INCORPORATING 0.03% TO 7% OF FLUORINE IN A FUSED MOLTEN REFRACTORY CONSISTING ESSENTIALLY OF 40% TO 78% MGO, 4% TO 58% CR2O3, UP TO 33% ALIO3, UP TO 14.5% FEO, UP TO 4.5% SIO2,UP TO 10% CAO, AND THE TOTAL OF SUCH OXIDES AMOUNTING TO AT LEAST 87% AND THEREAFTER COOLING THE MOLTEN REFRACTORY IN A MOLD TO FORM A SOLID SHAPED ARTICLE.
Claim 2
Dependent Claim
80 words
THE PROCESS FOR PREVENTING CRACKING OF FUSED CAST CHROME-MAGNESIA REFRACTORY DURING COOLING IN THE MOLD WHICH COMPRISES INCORPORATING 0.03% TO 7% OF FLUORINE IN A FUSED MOLTEN REFRACTORY CONSISTING ESSENTIALLY OF 40% TO 78% MGO, 4% TO 58% CR2O3, UP TO 33% ALIO3, UP TO 14.5% FEO, UP TO 4.5% SIO2,UP TO 10% CAO, AND THE TOTAL OF SUCH OXIDES AMOUNTING TO AT LEAST 87% AND THEREAFTER COOLING THE MOLTEN REFRACTORY IN A MOLD TO FORM A SOLID SHAPED ARTICLE.
References Cited (Backward Citations)
US2235077A
Cited
US2599566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-12 | 1967-11-11 | 1968-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-12 | 1971-11-11 | 1972-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-12 | 1975-11-11 | 1976-05-12 | $7700.00 | Window Closed / Lapsed |