Patent US2879838A successfully refreshed from Google Patents.
US2879838A
Expired / Lapsed
US
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By-product and heat recovery from residual liquor
Assignee: Babcock and Wilcox Co
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Filing: 1955-06-08
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Granted: 1959-03-31
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Expires: 1975-06-08
Abstract
No abstract record available.
Inventors
- 👤 James W Flynt
- 👤 Suda Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:57
CPC Classifications
F; F23; F23C; F23C99/00; F22; F22B; F22B31/00; F22B31/04; F22B31/045; F22G; F22G5/00; F22G5/02; F23B; F23B5/00; F23B5/02; F23G; F23G7/00; F23G7/04; F23C2700/00; F23C2700/06; F23C2700/066; Y; Y02; Y02E; Y02E20/00; Y02E20/12; Y10; Y10S; Y10S261/00; Y10S261/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US438872A
Cited
US795299A
Cited
US889641A
Cited
GB202312A
Cited
US2277946A
Cited
US2336833A
Cited
US2590905A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |