Patent US2537012A successfully refreshed from Google Patents.
US2537012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite refractory and method of bonding the same
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1947-06-20
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Granted: 1951-01-09
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Expires: 1967-06-20
Abstract
No abstract record available.
Inventors
- 👤 Leslie W Austin
- 👤 James C Hicks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:13
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/42; C04B35/12; C04B35/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A REFRACTORY COMPOSITION CONTAINING AS THE PRINCIPAL REFRACTORY INGREDIENT AN AGGREGATE COMPRISING A MIXTURE OF PERICLASE GRAINS AND A GRAIN MATERIAL CHOSEN FROM THE GROUP CONSISTING OF CHROMITE, MAGNESIOCHROMITE, AND MAGNESIUM ALUMINATE, AND AS BONDING COMPONENTS FINELY DIVIDED MAGNESIA, A CHROMIUM COMPOUND FREE OF ALKALI METAL COMPOUNDS AND SOLUBLE IN THE TEMPERING LIQUID FOR SAID COMPOSITION IN AN AMOUNT FROM THAT WHICH YIELDS 1/8% CR2O3 IN THE FIRED PRODUCT TO THAT WHICH FORMS A SATURATED SOLUTION IN THE TEMPERING LIQUID, AND FROM 1% TO 5% FINELY DIVIDED SILICA, THE PARTICLE SIZE OF SAID SILICA BEING SUBSTANTIALLY ENTIRELY LESS THAN 44 MICRONS DIAMETER AND A MAJOR PROPORTION BEING LESS THAN 10 MICRONS IN DIAMETER, SAID FINELY DIVIDED MAGNESIA BEING PRESENT IN AT LEAST AN AMOUNT OF FORM UPON FIRING MAGNESIUM CHROMITE WITH SAID CHROMIUM COMPOUND AND MAGNESIUM ORTHOSILICATE WITH SAID FINE SILICA.
Claim 2
Dependent Claim
141 words
A REFRACTORY COMPOSITION CONTAINING AS THE PRINCIPAL REFRACTORY INGREDIENT AN AGGREGATE COMPRISING A MIXTURE OF PERICLASE GRAINS AND A GRAIN MATERIAL CHOSEN FROM THE GROUP CONSISTING OF CHROMITE, MAGNESIOCHROMITE, AND MAGNESIUM ALUMINATE, AND AS BONDING COMPONENTS FINELY DIVIDED MAGNESIA, A CHROMIUM COMPOUND FREE OF ALKALI METAL COMPOUNDS AND SOLUBLE IN THE TEMPERING LIQUID FOR SAID COMPOSITION IN AN AMOUNT FROM THAT WHICH YIELDS 1/8% CR2O3 IN THE FIRED PRODUCT TO THAT WHICH FORMS A SATURATED SOLUTION IN THE TEMPERING LIQUID, AND FROM 1% TO 5% FINELY DIVIDED SILICA, THE PARTICLE SIZE OF SAID SILICA BEING SUBSTANTIALLY ENTIRELY LESS THAN 44 MICRONS DIAMETER AND A MAJOR PROPORTION BEING LESS THAN 10 MICRONS IN DIAMETER, SAID FINELY DIVIDED MAGNESIA BEING PRESENT IN AT LEAST AN AMOUNT OF FORM UPON FIRING MAGNESIUM CHROMITE WITH SAID CHROMIUM COMPOUND AND MAGNESIUM ORTHOSILICATE WITH SAID FINE SILICA.
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) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |