US2743306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction furnace
Assignee: Unifrax I LLC
•
Filing: 1953-08-12
•
Granted: 1956-04-24
•
Expires: 1973-08-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Stanley D Mark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:49
CPC Classifications
F; F27; F27D; F27D11/00; F27D11/06; F27B; F27B14/00; F27B14/08; F27B14/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
AN ELECTRIC INDUCTION FURNACE COMPRISING AN INDUCTOR, A SUSCEPTOR, AND A LOOSE FILLING COMPRISING FINELY DIVIDED SILICON CARBIDE POSITIONED BETWEEN THE INDUCTOR AND SUSCEPTOR.
Claim 2
Dependent Claim
24 words
AN ELECTRIC INDUCTION FURNACE COMPRISING AN INDUCTOR, A SUSCEPTOR, AND A LOOSE FILLING COMPRISING FINELY DIVIDED SILICON CARBIDE POSITIONED BETWEEN THE INDUCTOR AND SUSCEPTOR.
References Cited (Backward Citations)
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Cited
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Cited
US1812172A
Cited
US1823970A
Cited
US1963481A
Cited
US2303080A
Cited
US2665320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |