US2847952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drives for forced draft fans in steam plants
Assignee: Westinghouse Electric Corp
•
Filing: 1954-09-02
•
Granted: 1958-08-19
•
Expires: 1974-09-02
Abstract
No abstract record available.
Inventors
- 👤 John E Mcdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:07
CPC Classifications
F; F23; F23L; F23L5/00; F23L5/02; F04; F04D; F04D27/00; F04D27/002; F23L17/00; F23L2700/00; F23L2700/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1846863A
Cited
US2202793A
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US2395416A
Cited
US2486291A
Cited
US2428830A
Cited
US2632297A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |