US2491059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic turbine
Assignee: Allis Chalmers Corp
•
Filing: 1945-08-29
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Granted: 1949-12-13
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Expires: 1965-08-29
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Ring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:39
CPC Classifications
F; F03; F03B; F03B15/00; F03B15/02; F03B15/20; Y; Y02; Y02E; Y02E10/00; Y02E10/20; Y10; Y10T; Y10T137/00; Y10T137/0971; Y10T137/108; Y10T137/1098
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) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |