US3035929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparation of refractory products containing zirconia, alumina and silica
Assignee: Societe Europeenne des Produits Refractaires SAS
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Filing: 1959-02-17
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Granted: 1962-05-22
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Expires: 1979-02-17
Abstract
No abstract record available.
Inventors
- 👤 Hine Christian
- 👤 Costa Andre Mendes Da
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:17
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/48; C04B35/484
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A METHOD OF PREPARING A REFRACTORY PRODUCT CONSISTING ESSENTIALLY OF ZIRCONIA, ALUMINA AND SILICA, SAID METHOD COMPRISING THE SUCCESSIVE STEPS OF FIRST FUSING A FIRST BATCH CONTAINING NATURAL ZIRCON, A CARBONACEOUS REDUCING AGENT AND A PORTION OF THE ALUMINA CONTENT OF SAID REFRACTORY PRODUCT, WHICH PORTION IS SUFFICIENT TO REDUCE THE FUSION TEMPERATURE OF THE BATCH WHILE MAINTAINING SAID TEMPERATURE IN THE SILICA REDUCTION RANGE, TO OBTAIN AN ARTIFICIAL ZIRCITE HAVING A SUBSTANTIALLY HIGHER ZIRCONIA CONTENT AND A SUBSTANTIALLY LOWER ALUMINA CONTENT COMPARED WITH SAID REFRACTORY PRODUCT, AND THEN FUSING A SECOND BATCH CONTAINING SAID ARTIFICIAL ZIRCITE AND THE REMAINDER OF THE ALUMINA CONTENT OF SAID REFRACTORY PRODUCT.
Claim 2
Independent Claim
108 words
A METHOD OF PREPARING A REFRACTORY PRODUCT CONSISTING ESSENTIALLY OF ZIRCONIA, ALUMINA AND SILICA, SAID METHOD COMPRISING THE SUCCESSIVE STEPS OF FIRST FUSING A FIRST BATCH CONTAINING NATURAL ZIRCON, A CARBONACEOUS REDUCING AGENT AND A PORTION OF THE ALUMINA CONTENT OF SAID REFRACTORY PRODUCT, WHICH PORTION IS SUFFICIENT TO REDUCE THE FUSION TEMPERATURE OF THE BATCH WHILE MAINTAINING SAID TEMPERATURE IN THE SILICA REDUCTION RANGE, TO OBTAIN AN ARTIFICIAL ZIRCITE HAVING A SUBSTANTIALLY HIGHER ZIRCONIA CONTENT AND A SUBSTANTIALLY LOWER ALUMINA CONTENT COMPARED WITH SAID REFRACTORY PRODUCT, AND THEN FUSING A SECOND BATCH CONTAINING SAID ARTIFICIAL ZIRCITE AND THE REMAINDER OF THE ALUMINA CONTENT OF SAID REFRACTORY PRODUCT.
References Cited (Backward Citations)
US2271367A
Cited
US2624097A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |