US2499191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertical loop furnace
Assignee: General Electric Co
•
Filing: 1948-09-22
•
Granted: 1950-02-28
•
Expires: 1968-09-22
Abstract
No abstract record available.
Inventors
- 👤 Norman B Jones
- 👤 James L Mcfarland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:46
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1580511A
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US1765955A
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GB336168A
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US1811522A
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US1947546A
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US1956401A
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US2009856A
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US2060634A
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US2279917A
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US2345181A
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US2278136A
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US2469123A
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US2448835A
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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) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |