Patent US3204931A successfully refreshed from Google Patents.
US3204931A
Expired / Lapsed
US
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Stay ring for water turbines, pump turbines and pumps
Assignee: Nydqvist and Holm AB
•
Filing: 1963-05-07
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Granted: 1965-09-07
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Expires: 1983-05-07
Abstract
No abstract record available.
Inventors
- 👤 Edvardsen Edgar Sigfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:16
CPC Classifications
F; F03; F03B; F03B3/00; F03B3/16; F03B3/18; Y; Y02; Y02E; Y02E10/00; Y02E10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1896644A
Cited
US2291110A
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US2524390A
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US2736530A
Cited
DE876230C
Cited
US2808227A
Cited
US3139265A
Cited
US3051441A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |