Patent US2649278A successfully refreshed from Google Patents.
US2649278A
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US
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Rotor construction for fluid machines
Assignee: Individual
•
Filing: 1948-07-15
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Granted: 1953-08-18
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Expires: 1968-07-15
Abstract
No abstract record available.
Inventors
- 👤 Edward A Stalker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:49
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/08; F01D5/085; F01D5/087; F01D5/021; F01D5/12; F01D5/14; F01D5/18; F01D5/30; Y; Y10; Y10S; Y10S415/00; Y10S415/914
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1210978A
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US1601402A
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DE593093C
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FR810883A
Cited
US2232670A
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US2271971A
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US2335091A
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US2428728A
Cited
US2506581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |