Patent US2979000A successfully refreshed from Google Patents.
US2979000A
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US
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Cyclone furnace unit and method of operating the same
Assignee: Babcock and Wilcox Co
•
Filing: 1955-01-25
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Granted: 1961-04-11
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Expires: 1975-01-25
Abstract
No abstract record available.
Inventors
- 👤 Sifrin Andreas
- 👤 Hennecke Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:14
CPC Classifications
F; F23; F23C; F23C3/00; F23C3/006; F23C3/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE525424A
Cited
US1670276A
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US1452045A
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US1866404A
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US2594312A
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US2476507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |