US2800091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclone furnace
Assignee: Babcock and Wilcox Co
•
Filing: 1952-02-06
•
Granted: 1957-07-23
•
Expires: 1972-02-06
Abstract
No abstract record available.
Inventors
- 👤 Lotz Otto
- 👤 Schindler Ewald
- 👤 Schnelle Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:18
CPC Classifications
F; F23; F23C; F23C3/00; F23C3/006; F23C3/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE518173C
Cited
US1762505A
Cited
GB297345A
Cited
DE471330C
Cited
CH207327A
Cited
US2357301A
Cited
US2368827A
Cited
US2395103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |