US2945960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic turbine plant having a concrete spiral housing
Assignee: Sulzer Escher Wyss AG
•
Filing: 1957-05-06
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Granted: 1960-07-19
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Expires: 1977-05-06
Abstract
No abstract record available.
Inventors
- 👤 Obrist Heinrich Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:30
CPC Classifications
F; F03; F03B; F03B3/00; F03B3/16; F03B3/18; F03B3/186; F05; F05B; F05B2250/00; F05B2250/10; F05B2250/15; F05B2250/20; F05B2250/25; Y; Y02; Y02E; Y02E10/00; Y02E10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2733892A
Cited
CH80734A
Cited
US2077883A
Cited
AT174581B
Cited
FR1055531A
Cited
FR63149E
Cited
US2701313A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |