Patent US3230102A successfully refreshed from Google Patents.
US3230102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory
Assignee: Harbison Walker Refractories Co
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Filing: 1965-07-12
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Granted: 1966-01-18
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Expires: 1985-07-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Eldon D Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:09
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/10; C04B35/101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
222 words
A FIRED REFRACTORY CONDUIT MADE FROM A REFRACTORY BATCH CONSISTING OF 45 TO 75%, BY WEIGHT, SELECTED HIGH ALUMINA REFRACTORY MATERIAL, SAID SELECTED MATERIAL ANALYZING AT LEAST ABOUT 50% AL2O2, BY WEIGHT ON AN OXIDE ANALYSIS, AOUT 10 TO 30%, BY WEIGHT, AMORPHOUS SILICA, TOTAL HIGH ALUMINA REFRACTORY MATERIAL AND AMORPHOUS SAID AMORPHOUS SILICA RESTING ON A 65 MESH SCREEN THE SILICA BEING FROM 75 TO 85% OF THE BATCH, ABOUT 5 TO 15%, BY WEIGHT, MINUS 65 MESH BALLCLAY PLASTICIZER, THE REMAINDER BEING FINELY DIVIDED CLCINED ALUMINA; 50 TO 70% OF THE BATCH RESTING ON A 65 MESH SCREEN AND 30 TO 50% PASSING A 65 MESH SCREEN, THE FRACTION RESTING ON A 65 MESH SCREEN BEING FROM 25 TO 35% MINUS 3 AND RESTING ON A 10 MESH SCREEN, OF THAT FRACTION PASSING 65 MESH AT LEAST 70% THEREOF PASSING A 150 MESH SCREEN AND A PORTION THEREOF PASSING 325 MESH, THE PORTION PASSING 325 MESH CONTAINING AT LEAST A TOTAL OF 10%; BASED ON THE TOTAL BATCH WEIGH, OF CALCINED ALUMINA AND BALL CLAY, THE CALCINED ALUMINA AND BALL CLAY PASSING A 325 MESH SCREEN BEING PRESENT IN SUBSTANTIALLY EQUAL QUANTITIES, SAID CONDUIT CHARACTERIZED AS HAVING RELATIVELY COARSE HIGH ALUMINA REFRACTORY MATERIAL AND AMORPHOUS SILICA LOOSELY BONDED IN PLACE BY A MULLITE MATRIX HAVING A NETWORK OF TESSELLATED CRACKS.
Claim 2
Dependent Claim
222 words
A FIRED REFRACTORY CONDUIT MADE FROM A REFRACTORY BATCH CONSISTING OF 45 TO 75%, BY WEIGHT, SELECTED HIGH ALUMINA REFRACTORY MATERIAL, SAID SELECTED MATERIAL ANALYZING AT LEAST ABOUT 50% AL2O2, BY WEIGHT ON AN OXIDE ANALYSIS, AOUT 10 TO 30%, BY WEIGHT, AMORPHOUS SILICA, TOTAL HIGH ALUMINA REFRACTORY MATERIAL AND AMORPHOUS SAID AMORPHOUS SILICA RESTING ON A 65 MESH SCREEN THE SILICA BEING FROM 75 TO 85% OF THE BATCH, ABOUT 5 TO 15%, BY WEIGHT, MINUS 65 MESH BALLCLAY PLASTICIZER, THE REMAINDER BEING FINELY DIVIDED CLCINED ALUMINA; 50 TO 70% OF THE BATCH RESTING ON A 65 MESH SCREEN AND 30 TO 50% PASSING A 65 MESH SCREEN, THE FRACTION RESTING ON A 65 MESH SCREEN BEING FROM 25 TO 35% MINUS 3 AND RESTING ON A 10 MESH SCREEN, OF THAT FRACTION PASSING 65 MESH AT LEAST 70% THEREOF PASSING A 150 MESH SCREEN AND A PORTION THEREOF PASSING 325 MESH, THE PORTION PASSING 325 MESH CONTAINING AT LEAST A TOTAL OF 10%; BASED ON THE TOTAL BATCH WEIGH, OF CALCINED ALUMINA AND BALL CLAY, THE CALCINED ALUMINA AND BALL CLAY PASSING A 325 MESH SCREEN BEING PRESENT IN SUBSTANTIALLY EQUAL QUANTITIES, SAID CONDUIT CHARACTERIZED AS HAVING RELATIVELY COARSE HIGH ALUMINA REFRACTORY MATERIAL AND AMORPHOUS SILICA LOOSELY BONDED IN PLACE BY A MULLITE MATRIX HAVING A NETWORK OF TESSELLATED CRACKS.
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) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |