Patent US3635459A successfully refreshed from Google Patents.
US3635459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory brick having oblique surface
Assignee: Individual
•
Filing: 1968-02-29
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Granted: 1972-01-18
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Expires: 1988-02-29
Abstract
Abstract Bottom and wall refractory bricks for steel casting ladles are shaped to minimize penetration of slag into the lining formed by courses of the refractory bricks to prolong the life of the refractory bricks and to improve performance and lessen maintenance. The bricks have an oblique tilted midpart and end equal right parallelepipedal top and bottom socles or end surfaces. The long side of each brick is double the short side.
Inventors
- 👤 Arrigo Mare
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:39
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/02; F; F27; F27D; F27D1/00; F27D1/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
50 words
A refractory lining suitable for use in a steel casting ladle, comprising at least one course of refractory bricks in side-by-side relationship, each refractory brick having upper and lower right parallelepipedal socles of equal size between which is a four-sided midpart, each of said sides of said midpart being oblique.
Claim 2
Dependent Claim
50 words
A refractory lining suitable for use in a steel casting ladle, comprising at least one course of refractory bricks in side-by-side relationship, each refractory brick having upper and lower right parallelepipedal socles of equal size between which is a four-sided midpart, each of said sides of said midpart being oblique.
Claim 3
Dependent Claim
48 words
A brick according to claim 1, wherein each of said socles has a long side and a short side, the long sides of both socles being parallel to each other, and the long side of the socle being twice the length of the short side of the socle.
Claim 4
Dependent Claim
50 words
A refractory lining suitable for use in a steel casting ladle, comprising at least one course of refractory bricks in side-by-side relationship, each refractory brick having upper and lower right parallelepipedal socles of unequal size between which is a four-sided midpart, each of said sides of said midpart being oblique.
Claim 5
Dependent Claim
50 words
A refractory lining suitable for use in a steel casting ladle, comprising at least one course of refractory bricks in side-by-side relationship, each refractory brick having upper and lower right parallelepipedal socles of unequal size between which is a four-sided midpart, each of said sides of said midpart being oblique.
Claim 6
Dependent Claim
47 words
A brick according to claim 3, wherein each of said socles has a long side and a short side, the long sides of both socles being parallel to each other, and the long side of at least one socle being twice the length of its short side.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |