Patent US3544231A successfully refreshed from Google Patents.
US3544231A
Expired / Lapsed
US
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Stator-blade assembly for turbomachines
Assignee: Sulzer AG
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Filing: 1968-10-11
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Granted: 1970-12-01
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Expires: 1988-10-11
Abstract
No abstract record available.
Inventors
- 👤 Ferdinand Zerlauth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:25
CPC Classifications
F; F01; F01D; F01D9/00; F01D9/02; F01D9/04; F01D9/042; F01D9/044; F01D5/00; F01D5/12; F01D5/14; F01D5/18; F01D5/187; F01D9/041
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1061675A
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GB191224657A
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US2354587A
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GB661178A
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US2625367A
Cited
GB723505A
Cited
US2937805A
Cited
US3018085A
Cited
US3025037A
Cited
US2997275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |