US2915893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal clad refractory brick
Assignee: Kaiser Aluminum and Chemical Corp
•
Filing: 1953-03-27
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Granted: 1959-12-08
•
Expires: 1973-03-27
Abstract
No abstract record available.
Inventors
- 👤 Earl D Wilkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:14
CPC Classifications
B; B28; B28B; B28B23/00; B28B23/0018; F; F27; F27D; F27D1/00; F27D1/04; F27D1/06; F27D1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A COMPOSITE REFRACTORY FURNACE LINING ARTICLE COMPRISING A NONACID REFRACTORY BLOCK HAVING SIDE FACES AND END FACES, A METAL PLATE COVERING AT LEAST THE MAJOR PORTION OF A LEAST ONE OF SAID SIDE FACES, AND A COMBUSTIBLE ORGANIC ADHESIVE INTERPOSED BETWEEN SAID PLATE AND SAID BLOCK AND AFFIXING SAID PLATE TO SAID SIDE FACE, SAID ADHESIVE BEING STICKY AT ORDINARY ATMOSPHERIC TEMPERATURES.
Claim 2
Dependent Claim
62 words
A COMPOSITE REFRACTORY FURNACE LINING ARTICLE COMPRISING A NONACID REFRACTORY BLOCK HAVING SIDE FACES AND END FACES, A METAL PLATE COVERING AT LEAST THE MAJOR PORTION OF A LEAST ONE OF SAID SIDE FACES, AND A COMBUSTIBLE ORGANIC ADHESIVE INTERPOSED BETWEEN SAID PLATE AND SAID BLOCK AND AFFIXING SAID PLATE TO SAID SIDE FACE, SAID ADHESIVE BEING STICKY AT ORDINARY ATMOSPHERIC TEMPERATURES.
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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) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |