US2552044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directly fired waste-heat boiler
Assignee: Combustion Engineering Inc
•
Filing: 1947-06-03
•
Granted: 1951-05-08
•
Expires: 1967-06-03
Abstract
No abstract record available.
Inventors
- 👤 Huet Andre Philippe Je Hilaire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:15
CPC Classifications
F; F22; F22B; F22B13/00; F22B13/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US429900A
Cited
US668947A
Cited
US946310A
Cited
US2009852A
Cited
US2065850A
Cited
US2142409A
Cited
US2216809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |