Patent US2603476A successfully refreshed from Google Patents.
US2603476A
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US
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Circular open hearth melting furnace
Assignee: Individual
•
Filing: 1949-09-17
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Granted: 1952-07-15
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Expires: 1969-09-17
Abstract
No abstract record available.
Inventors
- 👤 Howard C Whiston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:25
CPC Classifications
F; F27; F27B; F27B3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US112831A
Cited
US295502A
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US1205611A
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US1283515A
Cited
US2080625A
Cited
US2069196A
Cited
US2386565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-15 | 1956-01-14 | 1956-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-15 | 1960-01-14 | 1960-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-15 | 1964-01-14 | 1964-07-15 | $7700.00 | Window Closed / Lapsed |