US2957436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclone furnaces
Assignee: Babcock and Wilcox Co
•
Filing: 1955-05-23
•
Granted: 1960-10-25
•
Expires: 1975-05-23
Abstract
No abstract record available.
Inventors
- 👤 Lotz Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:56
CPC Classifications
F; F23; F23C; F23C3/00; F23C3/006; F23C3/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE627759C
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US1535903A
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US2357303A
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US2357301A
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US2357302A
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US2361681A
Cited
US2483728A
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US2446968A
Cited
US2652011A
Cited
FR1025395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |