Patent US3030072A successfully refreshed from Google Patents.
US3030072A
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Torque limiting wicket gate operating mechanism for hydraulic turbines
Assignee: Library and Archives Canada
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Filing: 1959-12-07
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Granted: 1962-04-17
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Expires: 1979-12-07
Abstract
No abstract record available.
Inventors
- 👤 Lawrence M Boyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:33
CPC Classifications
F; F03; F03B; F03B3/00; F03B3/16; F03B3/18; F03B3/183; F16; F16B; F16B2200/00; F16B2200/40; F16B2200/403; Y; Y02; Y02E; Y02E10/00; Y02E10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US551177A
Cited
US579208A
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US1607773A
Cited
AT13298B
Cited
US986311A
Cited
US2525379A
Cited
US2726524A
Cited
US2862376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |