Patent US4592742A successfully refreshed from Google Patents.
US2530477A
Expired / Lapsed
US
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Means for balancing the axial thrust of elastic fluid compressors and turbines of the axial flow type
Assignee: Individual
•
Filing: 1949-07-13
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Granted: 1950-11-21
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Expires: 1969-07-13
Abstract
No abstract record available.
Inventors
- 👤 Ostmar Frans Eric Ossian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:52
CPC Classifications
F; F01; F01D; F01D3/00; F01D3/04; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |