US2447896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-temperature turbine
Assignee: Armco Inc
•
Filing: 1946-02-01
•
Granted: 1948-08-24
•
Expires: 1966-02-01
Abstract
No abstract record available.
Inventors
- 👤 Jr William Charles Clarke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:25
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1542232A
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US1736053A
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US1800730A
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US1962702A
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US2115733A
Cited
GB497511A
Cited
US2159724A
Cited
FR851496A
Cited
US2256614A
Cited
US2251163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-24 | 1952-02-23 | 1952-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-24 | 1956-02-23 | 1956-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-24 | 1960-02-23 | 1960-08-24 | $7700.00 | Window Closed / Lapsed |