US3282579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory lining
Assignee: Harbison Walker Refractories Co
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Filing: 1962-10-10
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Granted: 1966-11-01
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Expires: 1982-10-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Eldon D Miller
- 👤 Raymond S Beals
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:34
CPC Classifications
B; B32; B32B; B32B18/00; C; C04; C04B; C04B2237/00; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/259
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
AS AT LEAST A PART OF A HIGH TEMPERATURE REFRACTORYY LINING, A COMPOSITE SECTION WHICH INCLUDES A BACK-UP PORTION AND A HOT FACE PORTION, BOTH THE BACK-UP PORTION AND THE HOT FACE PORTION BEING HIGH ALUMINA REFRACTORY MONOLITH COMPOSITIONS CONTAINING AT LEAST ABOUT 50% A1203, THE BACK-UP PORTION, UPON FIRING BEING MINERALOGICALLY CHARACTERIZED AS COARSE TEXTURED, AND HAVING RELATIVELY COARSE PARTICLES OF HIGH ALUMINA REFRACTORY MATERIAL RELATIVELY LOOSELY BONDED IN PLACE, SAID FIRED BACK-UP PORTION BEING FURTHER MINERALOGICALLY CHARACTERIZED BY A NETWORK OF TESSELATED CRACKS, WHICH NETWORK ENCOMPASSES A MAJOR PORTION OF MOST OF THE COARSE ALUMINA PARTICLES, SAID HOT FACE PORTION, UPON FIRING, BEING MINERALOGICALLY CHARACTERIZED AS COARSE TEXTURED, HAVING COARSE TEXTURED HIGH ALUMINA REFACTORY PARTICLES INTERSPERSED THROUGH A DENSE, RIGID, MATRIX, SAID MATRIX CHARACTERIZED AS HAVING VERY SMALL AND HIGHLY DISPERSED VOIDS AND THE BACK-UP PORTION AND THE HOT FACE CEROMICALLY BONDING TO EACH OTHER OVER ABUTTING INTERFACES UPON FIRING OF THE LINING TO PROVIDE A MONOLITHIC CONSTRUCTION INCLUDING BOTH THE BACK PORTION AND THE HOT FACE PORTION.
Claim 2
Dependent Claim
170 words
AS AT LEAST A PART OF A HIGH TEMPERATURE REFRACTORYY LINING, A COMPOSITE SECTION WHICH INCLUDES A BACK-UP PORTION AND A HOT FACE PORTION, BOTH THE BACK-UP PORTION AND THE HOT FACE PORTION BEING HIGH ALUMINA REFRACTORY MONOLITH COMPOSITIONS CONTAINING AT LEAST ABOUT 50% A1203, THE BACK-UP PORTION, UPON FIRING BEING MINERALOGICALLY CHARACTERIZED AS COARSE TEXTURED, AND HAVING RELATIVELY COARSE PARTICLES OF HIGH ALUMINA REFRACTORY MATERIAL RELATIVELY LOOSELY BONDED IN PLACE, SAID FIRED BACK-UP PORTION BEING FURTHER MINERALOGICALLY CHARACTERIZED BY A NETWORK OF TESSELATED CRACKS, WHICH NETWORK ENCOMPASSES A MAJOR PORTION OF MOST OF THE COARSE ALUMINA PARTICLES, SAID HOT FACE PORTION, UPON FIRING, BEING MINERALOGICALLY CHARACTERIZED AS COARSE TEXTURED, HAVING COARSE TEXTURED HIGH ALUMINA REFACTORY PARTICLES INTERSPERSED THROUGH A DENSE, RIGID, MATRIX, SAID MATRIX CHARACTERIZED AS HAVING VERY SMALL AND HIGHLY DISPERSED VOIDS AND THE BACK-UP PORTION AND THE HOT FACE CEROMICALLY BONDING TO EACH OTHER OVER ABUTTING INTERFACES UPON FIRING OF THE LINING TO PROVIDE A MONOLITHIC CONSTRUCTION INCLUDING BOTH THE BACK PORTION AND THE HOT FACE PORTION.
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) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |