US2480277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-pass regenerative air preheater
Assignee: Alstom Power Inc
•
Filing: 1946-08-22
•
Granted: 1949-08-30
•
Expires: 1966-08-22
Abstract
No abstract record available.
Inventors
- 👤 William D Yerrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:01
CPC Classifications
F; F28; F28G; F28G9/00; F28G9/005; F28D; F28D19/00; F28D19/04; F28D19/047; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/01; Y10S165/012
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1820199A
Cited
US1759916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-29 | 1953-02-28 | 1953-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-29 | 1957-02-28 | 1957-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-29 | 1961-02-28 | 1961-08-30 | $7700.00 | Window Closed / Lapsed |