US2769619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parallel and counterflow of air in preheater
Assignee: Alstom Power Inc
•
Filing: 1952-02-19
•
Granted: 1956-11-06
•
Expires: 1972-02-19
Abstract
No abstract record available.
Inventors
- 👤 Juhasz Stephen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:26
CPC Classifications
F; F28; F28D; F28D19/00; F28D19/04; F28D19/041; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/013; Y10S165/016; Y10S165/018; Y10S165/921
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1929176A
Cited
US2230799A
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US2321129A
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US2429619A
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US2480277A
Cited
US2607564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |