US3324810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory with expansion means attached
Assignee: Kaiser Aluminum and Chemical Corp
•
Filing: 1964-10-30
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Granted: 1967-06-13
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Expires: 1984-10-30
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Neely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:23
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/0003; F27D1/0023; F27D1/04; F27D1/06; F27D1/08; F27D1/0026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A REFRACTORY UNIT COMPRISING: A REFRACTORY SHAPE HAVING AN OUTER END, AN INNER END, AND OPPOSED SIDE FACES DISPOSED BETWEEN THE SAID ENDS; AND INNER STRIP OF A COMBUSTIBLE MATERIAL ATTACHED TO AT LEAST ONE OF SAID SIDE FACES ADJACENT SAID INNER END; AND AN OUTER STRIP OF ABESTOS
Claim 2
Dependent Claim
49 words
A REFRACTORY UNIT COMPRISING: A REFRACTORY SHAPE HAVING AN OUTER END, AN INNER END, AND OPPOSED SIDE FACES DISPOSED BETWEEN THE SAID ENDS; AND INNER STRIP OF A COMBUSTIBLE MATERIAL ATTACHED TO AT LEAST ONE OF SAID SIDE FACES ADJACENT SAID INNER END; AND AN OUTER STRIP OF ABESTOS
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) | 1970-06-12 | 1970-12-12 | 1971-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-12 | 1974-12-12 | 1975-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-12 | 1978-12-12 | 1979-06-13 | $7700.00 | Window Closed / Lapsed |