US2773776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory cement
Assignee: EIDP Inc
•
Filing: 1953-04-21
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Granted: 1956-12-11
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Expires: 1973-04-21
Abstract
No abstract record available.
Inventors
- 👤 Weidman Verne Wesley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:36
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C04B28/26; C04B35/00; C04B35/01; C04B35/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A CORROSION-RESISTANT REFRACTORY CEMENT COMPOSITION CONSISTING ESSENTIALLY OF A WORKABLE MIXTURE MADE UP OF A FILLER OF GRANULAR ZIRCON HAVING A PARTICLE SIZE DISTRIBUTION SUCH THAT APPROXIMATELY ONE-THIRD LIES IN THE RANGE FROM 80 TO 160 MESH, ONE-THIRD FROM 160 TO 180 MESH AND ONE-THIRD FINER THAN 180 MESH AND MILLED ZIRCON HAVING A PARTICLE SIZE DISTRIBUTION SUCH THAT APPROXIMATELY 95% BY WEIGHT IS FINER THAN 325 MESH, SAID GRANULAR ZIRCON BEING IN THE PROPORTION OF ABOUT 50 TO 75% BY WEIGHT OF THE TOTAL ZIRCON, ABOUT 1 1/2 TO 2% BY WEIGHT SODIUM SILICONFLUORIDE SETTING ACCELERATOR, AND A BINDER OF AQUEOUS SODIUM SILICATE.
Claim 2
Dependent Claim
104 words
A CORROSION-RESISTANT REFRACTORY CEMENT COMPOSITION CONSISTING ESSENTIALLY OF A WORKABLE MIXTURE MADE UP OF A FILLER OF GRANULAR ZIRCON HAVING A PARTICLE SIZE DISTRIBUTION SUCH THAT APPROXIMATELY ONE-THIRD LIES IN THE RANGE FROM 80 TO 160 MESH, ONE-THIRD FROM 160 TO 180 MESH AND ONE-THIRD FINER THAN 180 MESH AND MILLED ZIRCON HAVING A PARTICLE SIZE DISTRIBUTION SUCH THAT APPROXIMATELY 95% BY WEIGHT IS FINER THAN 325 MESH, SAID GRANULAR ZIRCON BEING IN THE PROPORTION OF ABOUT 50 TO 75% BY WEIGHT OF THE TOTAL ZIRCON, ABOUT 1 1/2 TO 2% BY WEIGHT SODIUM SILICONFLUORIDE SETTING ACCELERATOR, AND A BINDER OF AQUEOUS SODIUM SILICATE.
References Cited (Backward Citations)
US2429872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |