US3245811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vessel linings
Assignee: Harbison Walker Refractories Co
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Filing: 1964-03-05
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Granted: 1966-04-12
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Expires: 1984-03-05
Abstract
No abstract record available.
Inventors
- 👤 Peter H Havranek
- 👤 Davies Ben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:16
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/03; C04B35/04; C04B35/043; C04B35/047; C04B35/0473; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/44; F; F27; F27D; F27D1/00; F27D1/0003; F27D1/0006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A BURNED REFRACTORY BRICK FOR USE IN CONTACT WITH SILICEOUS SLAGS AND MADE FROM A BATCH CONSISTING ESSENTIALLY OF CHROME ORE AND BETWEEN 15 AND 55%, BY WEIGHT, -65 MESH CHEMICALLY BASIC FUSED GRAIN, SAID FUSED GRAIN ANALYZING, ON AN OXIDE BASIS, ABOUT 60 TO 65% OF MGO, ABOUT 32 TO 38% OF THE R2O3 OXIDES CR2O3, AL2O3 AND FE2O3, WITH THE FE2O3 AMOUNTING TO NO MORE THAN ABOUT 12%, SAID FUSED GRAIN MINERALOGICALLY CHARACTERIZED BY A SUBSTANTIALLY HOMOGENEOUS AND HIGHLY CRYSTALLINE MATRIX HAVING SPACED DEPOSITS OF CHROME SPINEL, ANY SILICATES APPEARING AS SPACED SUBSTANTIALLY DISCONNECTED POCKETS THROUGH THE GRAIN, SAID BATCH HAVING A -4+65 MESH FRACTION AND A -65 MESH FRACTION, SAID -65 MESH FRACTION CONSTITUTING FROM ABOUT 40 TO ABOUT 60%, BY WEIGHT, OF THE BATCH, AND FROM 40 TO 60% BY WEIGHT, OF SAID -65 MESH FRACTION BEING HELD ON A 325 MESH SCREEN.
Claim 2
Dependent Claim
147 words
A BURNED REFRACTORY BRICK FOR USE IN CONTACT WITH SILICEOUS SLAGS AND MADE FROM A BATCH CONSISTING ESSENTIALLY OF CHROME ORE AND BETWEEN 15 AND 55%, BY WEIGHT, -65 MESH CHEMICALLY BASIC FUSED GRAIN, SAID FUSED GRAIN ANALYZING, ON AN OXIDE BASIS, ABOUT 60 TO 65% OF MGO, ABOUT 32 TO 38% OF THE R2O3 OXIDES CR2O3, AL2O3 AND FE2O3, WITH THE FE2O3 AMOUNTING TO NO MORE THAN ABOUT 12%, SAID FUSED GRAIN MINERALOGICALLY CHARACTERIZED BY A SUBSTANTIALLY HOMOGENEOUS AND HIGHLY CRYSTALLINE MATRIX HAVING SPACED DEPOSITS OF CHROME SPINEL, ANY SILICATES APPEARING AS SPACED SUBSTANTIALLY DISCONNECTED POCKETS THROUGH THE GRAIN, SAID BATCH HAVING A -4+65 MESH FRACTION AND A -65 MESH FRACTION, SAID -65 MESH FRACTION CONSTITUTING FROM ABOUT 40 TO ABOUT 60%, BY WEIGHT, OF THE BATCH, AND FROM 40 TO 60% BY WEIGHT, OF SAID -65 MESH FRACTION BEING HELD ON A 325 MESH SCREEN.
References Cited (Backward Citations)
US2087107A
Cited
US2636827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |