US3078173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum melting furnace refractory
Assignee: Harbison Walker Refractories Co
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Filing: 1960-11-08
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Granted: 1963-02-19
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Expires: 1980-11-08
Abstract
No abstract record available.
Inventors
- 👤 James L Dolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:12
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/42; C04B35/10; C04B35/101; C04B35/12; C04B35/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A FIRED REFRACTORY BRICK, SAID BRICK CHARACTERIZED BY RESISTANCE TO PENETRATION AND REACTION WITH MOLTEN ALUMINUM AND ITS ALLOYS, AND CONSISTING ESSENTIALLY OF, BY WEIGHT, FROM ABOUT 1 TO 30% OF A SUBSTANCE OF THE GROUP CONSISTING OF ALKALINE EARTH OXIDES AND ALKALINE EARTH OXIDE, POUNDS SUPPLYING THAT AMOUNT OF ALKALINE EARTH OXIDE, THE REMAINDER SUBSTANTIALLY ALL MATERIAL OF THE GROUP CONSISTING OF ALUMINA AND ALUMINUM ORES CONTAINING, BY OXIDE ANALYSIS, AT LEAST ABOUT 50% OF AL2O3, SAID SUBSTANCE AND SAID MATERIAL BEING PRESENT IN A BRICKMAKING GRADED SIZE RANGE, AT LEAST ABOUT 50% THEREOF BEING COARSER THAN 150 MESH, SAID BRICK BEING CHARACTERIZED AS SUBSTANTIALLY FREE OF ANY GLASSY PHASE AND HAVING LESS THAN ABOUT 30% APPARENT POROSITY.
Claim 2
Dependent Claim
119 words
A FIRED REFRACTORY BRICK, SAID BRICK CHARACTERIZED BY RESISTANCE TO PENETRATION AND REACTION WITH MOLTEN ALUMINUM AND ITS ALLOYS, AND CONSISTING ESSENTIALLY OF, BY WEIGHT, FROM ABOUT 1 TO 30% OF A SUBSTANCE OF THE GROUP CONSISTING OF ALKALINE EARTH OXIDES AND ALKALINE EARTH OXIDE, POUNDS SUPPLYING THAT AMOUNT OF ALKALINE EARTH OXIDE, THE REMAINDER SUBSTANTIALLY ALL MATERIAL OF THE GROUP CONSISTING OF ALUMINA AND ALUMINUM ORES CONTAINING, BY OXIDE ANALYSIS, AT LEAST ABOUT 50% OF AL2O3, SAID SUBSTANCE AND SAID MATERIAL BEING PRESENT IN A BRICKMAKING GRADED SIZE RANGE, AT LEAST ABOUT 50% THEREOF BEING COARSER THAN 150 MESH, SAID BRICK BEING CHARACTERIZED AS SUBSTANTIALLY FREE OF ANY GLASSY PHASE AND HAVING LESS THAN ABOUT 30% APPARENT POROSITY.
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) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |