US2701129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary valve regenerator
Assignee: Alstom Power Inc
•
Filing: 1952-03-05
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Granted: 1955-02-01
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Expires: 1972-03-05
Abstract
No abstract record available.
Inventors
- 👤 William D Yerrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:03
CPC Classifications
F; F28; F28D; F28D19/00; F28D19/04; F02; F02C; F02C7/00; F02C7/08; F02C7/10; F02C7/105; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/037; Y10S165/038; Y10S165/039
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-31 | 1958-08-02 | 1959-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-31 | 1962-08-02 | 1963-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-31 | 1966-08-02 | 1967-02-01 | $7700.00 | Window Closed / Lapsed |