US2593352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of zirconium silicate refractory
Assignee: SMITH
•
Filing: 1946-07-23
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Granted: 1952-04-15
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Expires: 1966-07-23
Abstract
No abstract record available.
Inventors
- 👤 Shaw Clifford
- 👤 Smith William Edwin
- 👤 Greensmith Denis Eric Bosworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:38
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PROCESS FOR THE PRODUCTION OF A REFRACTORY MATERIAL WHICH COMPRISES REACTING BY HEATING A MIXTURE OF (A) ZIRCONIA WITH (B) FINELY-DIVIDED SILICA IN SUBSTANTIALLY THE STOICHIOMETRIC PROPORRIONS REQUIRED FOR THE FORMATION OF ZIRCON, AND (C) MINERAL ZIRCON TO A TEMPERATURE ABOVE 1,000* C. BUT BELOW THAT AT WHICH FUSION OF THE MIXTURE TAKES PLACE AND THEREAFTER COOLING THE PRODUCT, WHEREBY ZIRCONIUM SILICATE IS FORMED IN SITU AND IS PRESENT IN THE COMPOSITION IN SUFFICIENT QUANTITY TO BIND THE PARTICLES OF THE MINERAL ZIRCON.
Claim 2
Dependent Claim
84 words
A PROCESS FOR THE PRODUCTION OF A REFRACTORY MATERIAL WHICH COMPRISES REACTING BY HEATING A MIXTURE OF (A) ZIRCONIA WITH (B) FINELY-DIVIDED SILICA IN SUBSTANTIALLY THE STOICHIOMETRIC PROPORRIONS REQUIRED FOR THE FORMATION OF ZIRCON, AND (C) MINERAL ZIRCON TO A TEMPERATURE ABOVE 1,000* C. BUT BELOW THAT AT WHICH FUSION OF THE MIXTURE TAKES PLACE AND THEREAFTER COOLING THE PRODUCT, WHEREBY ZIRCONIUM SILICATE IS FORMED IN SITU AND IS PRESENT IN THE COMPOSITION IN SUFFICIENT QUANTITY TO BIND THE PARTICLES OF THE MINERAL ZIRCON.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |