Patent US1972978A successfully refreshed from Google Patents.
Patent US2829877A successfully refreshed from Google Patents.
US2829877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory
Assignee: Kaiser Aluminum and Chemical Corp
•
Filing: 1955-09-09
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Granted: 1958-04-08
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Expires: 1975-09-09
Abstract
No abstract record available.
Inventors
- 👤 Jr George C Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:05
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/04; F27D1/06; F27D1/08; F27B; F27B7/00; F27B7/20; F27B7/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
A COMPOSITE REFRACTORY ARTICLE FOR LINING ROTARY CEMENT KILNS COMPRISING A WEDGE-SHAPED, NON-ACID REFRACTORY BODY HAVING SIDE FACES TWO OF WHICH ARE IN OPPOSED DIVERGING RELATION, AND END FACES, ONE OF SAID END FACES BEING SMALLER THAN THE OTHER END FACE AND ADAPTED TO BE DISPOSED TOWARD THE HOT ZONE OF A KILN, AN OXIDIZABLE METAL PLATE MEANS COVERING AT LEAST A MAJOR PORTION OF ONE OF SAID DIVERGENT SIDE FACES AND A PORTION OF SAID SMALLER END FACE OF THE BODY, THE OXIDIZABLE PLATE MEANS COVERING THE PORTION OF SAID SMALLER END FACE BEING PRESENT IN AMOUNT SUFFICIENT TO MELT AND FLOW OVER SAID END FACE WHEN EXPOSED TO HEAT OF A KILM TO FORM A COATING THEREOVER, AND A COMBUSTIBLE ADHESIVE AFFIXING SAID OXIDIZABLE PLATE MEANS TO SAID SIDE FACE OF THE REFRACTORY BODY, SAID COMPOSITE ARTICLE ADAPTED TO BE ORIENTED IN A KILN LINING SUCH THAT THE PLATE MEANS COVERING SAID SIDE FACE IS DISPOSED BETWEEN ADJACENT SIMILAR REFRACTORY ARTICLES DEFINING A LINING RING.
Claim 2
Dependent Claim
167 words
A COMPOSITE REFRACTORY ARTICLE FOR LINING ROTARY CEMENT KILNS COMPRISING A WEDGE-SHAPED, NON-ACID REFRACTORY BODY HAVING SIDE FACES TWO OF WHICH ARE IN OPPOSED DIVERGING RELATION, AND END FACES, ONE OF SAID END FACES BEING SMALLER THAN THE OTHER END FACE AND ADAPTED TO BE DISPOSED TOWARD THE HOT ZONE OF A KILN, AN OXIDIZABLE METAL PLATE MEANS COVERING AT LEAST A MAJOR PORTION OF ONE OF SAID DIVERGENT SIDE FACES AND A PORTION OF SAID SMALLER END FACE OF THE BODY, THE OXIDIZABLE PLATE MEANS COVERING THE PORTION OF SAID SMALLER END FACE BEING PRESENT IN AMOUNT SUFFICIENT TO MELT AND FLOW OVER SAID END FACE WHEN EXPOSED TO HEAT OF A KILM TO FORM A COATING THEREOVER, AND A COMBUSTIBLE ADHESIVE AFFIXING SAID OXIDIZABLE PLATE MEANS TO SAID SIDE FACE OF THE REFRACTORY BODY, SAID COMPOSITE ARTICLE ADAPTED TO BE ORIENTED IN A KILN LINING SUCH THAT THE PLATE MEANS COVERING SAID SIDE FACE IS DISPOSED BETWEEN ADJACENT SIMILAR REFRACTORY ARTICLES DEFINING A LINING RING.
References Cited (Backward Citations)
US743538A
Cited
GB190408978A
Cited
US2148054A
Cited
US2216813A
Cited
US2125192A
Cited
US2125193A
Cited
US2256272A
Cited
US2230142A
Cited
US2230141A
Cited
GB638767A
Cited
US2577428A
Cited
US2652793A
Cited
US2580519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |