Patent US2809026A successfully refreshed from Google Patents.
US2809026A
Expired / Lapsed
US
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Furnace for heating reaction vessels
Assignee: Union Carbide Corp
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Filing: 1954-06-09
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Granted: 1957-10-08
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Expires: 1974-06-09
Abstract
No abstract record available.
Inventors
- 👤 Glen D Bagley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:50
CPC Classifications
F; F27; F27B; F27B5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US837273A
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US2591097A
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US2671011A
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US2697032A
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US2693952A
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US2610109A
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US2644744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |