US3301546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace construction
Assignee: Harbison Walker Refractories Co
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Filing: 1964-03-06
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Granted: 1967-01-31
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Expires: 1984-03-06
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Hansen
- 👤 Francis P Shonkwiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:13
CPC Classifications
F; F27; F27B; F27B3/00; B; B28; B28B; B28B23/00; B28B23/0018; F23; F23M; F23M5/00; F23M5/06; F27D; F27D1/00; F27D1/04; F27D1/06; F27D1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A METALLURGICAL FURNACE LINING OR WALL AT LEAST A PORTION OF WHICH IS CONSTRUCTED OF A PLURALITY OF SUBSTANTIALLY IDENTICAL REFRACTORY SHAPES, SAID SHAPES HAVING INTERSECTING PLANAR SIDE SURFACES EXTENDING BETWEEN TWO OPPOSED FACES, EACH SHAPE HAVING AN OXIDIZABLE CASE EXTENDING SUBSTANTIALLY FROM ONE FACE TO ANOTHER OVER AT LEAST TWO INTERSECING ADJACENT SIDE SURFACES, SAID SHAPES BEING SUBSTANTIALLY UNIFORM IN CROSS SECTION FROM ONE FACE TO THE OTHER, THERE BEING AT LEAST ONE EXPANSION CRIMP FORMED AT EACH END OF EACH OF THE PORTIONS OF THE METAL CASES COVERING SAID ADJACENT SIDE SURFACES, ALL CRIMPS IN EACH SHAPE BEING CONTIGUOUSLY POSITIONED ADJACENT A FLAT SIDE SURFACE OF AN ADJACENT SHAPE, SAID WALL THEREBY CHARACTERIZED BY A PLURALITY OF INTERCONNECTED GENERALLY L-SHAPED PASSAGES OF UNIFORM DIMENSION FROM ONE SIDE OF THE WALL TO THE OTHER BEFORE FURNACE HEATUP.
Claim 2
Dependent Claim
138 words
A METALLURGICAL FURNACE LINING OR WALL AT LEAST A PORTION OF WHICH IS CONSTRUCTED OF A PLURALITY OF SUBSTANTIALLY IDENTICAL REFRACTORY SHAPES, SAID SHAPES HAVING INTERSECTING PLANAR SIDE SURFACES EXTENDING BETWEEN TWO OPPOSED FACES, EACH SHAPE HAVING AN OXIDIZABLE CASE EXTENDING SUBSTANTIALLY FROM ONE FACE TO ANOTHER OVER AT LEAST TWO INTERSECING ADJACENT SIDE SURFACES, SAID SHAPES BEING SUBSTANTIALLY UNIFORM IN CROSS SECTION FROM ONE FACE TO THE OTHER, THERE BEING AT LEAST ONE EXPANSION CRIMP FORMED AT EACH END OF EACH OF THE PORTIONS OF THE METAL CASES COVERING SAID ADJACENT SIDE SURFACES, ALL CRIMPS IN EACH SHAPE BEING CONTIGUOUSLY POSITIONED ADJACENT A FLAT SIDE SURFACE OF AN ADJACENT SHAPE, SAID WALL THEREBY CHARACTERIZED BY A PLURALITY OF INTERCONNECTED GENERALLY L-SHAPED PASSAGES OF UNIFORM DIMENSION FROM ONE SIDE OF THE WALL TO THE OTHER BEFORE FURNACE HEATUP.
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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |