Patent US2563908A successfully refreshed from Google Patents.
US2563908A
Expired / Lapsed
US
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Forge furnace
Assignee: Surface Combustion Corp
•
Filing: 1948-07-16
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Granted: 1951-08-14
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Expires: 1968-07-16
Abstract
No abstract record available.
Inventors
- 👤 Ernest K Bastress
- 👤 Coriolis Ernest G De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:20
CPC Classifications
C; C21; C21D; C21D9/00; B; B21; B21J; B21J17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1445220A
Cited
FR599839A
Cited
US2067436A
Cited
US1946971A
Cited
US2126325A
Cited
US2225166A
Cited
US2333579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |