US2873554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for and a method of recovering heat from molten slag
Assignee: Babcock and Wilcox Co
•
Filing: 1956-05-15
•
Granted: 1959-02-17
•
Expires: 1976-05-15
Abstract
No abstract record available.
Inventors
- 👤 Sifrin Andreas
- 👤 Hennecke Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:37
CPC Classifications
F; F23; F23L; F23L15/00; F23J; F23J1/00; F23J1/08; Y; Y02; Y02E; Y02E20/00; Y02E20/34; Y10; Y10S; Y10S425/00; Y10S425/101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US818541A
Cited
US1115321A
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DE389239C
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US2044680A
Cited
US2464187A
Cited
US2484792A
Cited
US2562149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |