Patent US941409A successfully refreshed from Google Patents.
US941409A
Expired / Lapsed
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Elastic-fluid turbine.
Assignee: Westinghouse Machine Co
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Filing: 1905-03-09
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Granted: 1909-11-30
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Expires: 1925-03-09
Abstract
No abstract record available.
Inventors
- 👤 Raymond N Ehrhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:43
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/20; F01D17/22; F01D17/26; Y; Y10; Y10S; Y10S60/00; Y10S60/907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1912-11-29 | 1913-05-31 | 1913-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-11-29 | 1917-05-31 | 1917-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-11-29 | 1921-05-31 | 1921-11-30 | $7700.00 | Window Closed / Lapsed |