US2643519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regenerative steam power plant in which an extraction turbine supplies steam to desuperheaters which serve to heat feed water
Assignee: Individual
•
Filing: 1949-03-02
•
Granted: 1953-06-30
•
Expires: 1969-03-02
Abstract
No abstract record available.
Inventors
- 👤 Richard C Powell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:14
CPC Classifications
F; F01; F01K; F01K7/00; F01K7/34; F01K7/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US938309A
Cited
US1615003A
Cited
GB206651A
Cited
DE441453C
Cited
US1781368A
Cited
US1846047A
Cited
GB255050A
Cited
US1750035A
Cited
GB284204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |