US2999759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnesia bbick
Assignee: —
•
Filing: —
•
Granted: 1961-09-12
•
Expires: 1978-09-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:34
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/66; C04B35/01; C04B35/013; C04B35/03; C04B35/04; C04B35/043; C04B35/622; C04B35/626; C04B35/63; C04B35/6303; F; F27; F27D; F27D1/00; F27D1/0003; F27D1/0006; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3206; C04B2235/3208; C04B2235/3217; C04B2235/3222
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
IN PRODUCING BASIC REFRACTORY BRINK HAVING RESISTANCE TO CRACKING IN THE UNBURNED CONDITION THE ART WHICH INCLUDES MIXING (1) REFRACTORY PARTICLES OF THE CLASS CONSISTING OF MAGNESIA, MIXTURE OF AT LEAST 15% OF MAGNESIA WITH CHROME ORE MAKING UP THE BALANCE, MIXTURES OF MAGNESIA WITH 5% TO 75% OLIVINE, AND MIXTURES OF MAGNESIA WITH 1% TO 25% ALUMINA, SAID MAGNESIA BEING DEAD-BURNED AND FURTHER BEING CHARACTERIZED BY HAVING THE PROPERTY OF PROMOTING CRACKING OF ORDINARY BASIC REFRACTORY BRICK WHEN MOLDED WET WITHWATER AND DRYING AT TEMPERATURES SHORT OF MINERALIZING TEMPERATURES; (2) A CRACK-PREVENTING MATERIAL CONSISTING ESSENTIALLY OF A BORON OXYGEN COMPOUND IN A CONCENTRATION OF 0.02% TO 0.30% CALCULATED AS B2O3, SAID PERCENTAGES BEING BY WEIGHT ON A DRY BASIS AND SAID COMPOUND BEING A SEPCIFIC ADDITIVE SUPPLEMENTING THE COMPOSITION OF THE PARTICLES; AND (3) WATER; MOLDING INTO BRICK AT PRESSURES IN EXCESS OF ABOUT 5000 P.S.I. THE MIXTURE THUS FORMED; AND DRYING THE BRICK AT TEMPERATURES SHORT OF MINERALIZING TEMPERATURES IN THE PRESENCE OF SAID REFRACTORY PARTICLES.
Claim 2
Dependent Claim
168 words
IN PRODUCING BASIC REFRACTORY BRINK HAVING RESISTANCE TO CRACKING IN THE UNBURNED CONDITION THE ART WHICH INCLUDES MIXING (1) REFRACTORY PARTICLES OF THE CLASS CONSISTING OF MAGNESIA, MIXTURE OF AT LEAST 15% OF MAGNESIA WITH CHROME ORE MAKING UP THE BALANCE, MIXTURES OF MAGNESIA WITH 5% TO 75% OLIVINE, AND MIXTURES OF MAGNESIA WITH 1% TO 25% ALUMINA, SAID MAGNESIA BEING DEAD-BURNED AND FURTHER BEING CHARACTERIZED BY HAVING THE PROPERTY OF PROMOTING CRACKING OF ORDINARY BASIC REFRACTORY BRICK WHEN MOLDED WET WITHWATER AND DRYING AT TEMPERATURES SHORT OF MINERALIZING TEMPERATURES; (2) A CRACK-PREVENTING MATERIAL CONSISTING ESSENTIALLY OF A BORON OXYGEN COMPOUND IN A CONCENTRATION OF 0.02% TO 0.30% CALCULATED AS B2O3, SAID PERCENTAGES BEING BY WEIGHT ON A DRY BASIS AND SAID COMPOUND BEING A SEPCIFIC ADDITIVE SUPPLEMENTING THE COMPOSITION OF THE PARTICLES; AND (3) WATER; MOLDING INTO BRICK AT PRESSURES IN EXCESS OF ABOUT 5000 P.S.I. THE MIXTURE THUS FORMED; AND DRYING THE BRICK AT TEMPERATURES SHORT OF MINERALIZING TEMPERATURES IN THE PRESENCE OF SAID REFRACTORY PARTICLES.
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) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |