Patent US3175803A successfully refreshed from Google Patents.
US3175803A
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US
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Method of securing runner blades to kaplan type turbine hubs
Assignee: Library and Archives Canada
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Filing: 1963-01-15
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Granted: 1965-03-30
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Expires: 1983-01-15
Abstract
No abstract record available.
Inventors
- 👤 Robert A Newey
- 👤 Victor G M Chatfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:12
CPC Classifications
F; F03; F03B; F03B3/00; F03B3/12; F03B3/14; F03B3/145; F05; F05B; F05B2260/00; F05B2260/70; F05B2260/76; Y; Y02; Y02E; Y02E10/00; Y02E10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |