Patent US3070349A successfully refreshed from Google Patents.
US3070349A
Expired / Lapsed
US
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Multistage multiple-reentry turbine
Assignee: Individual
•
Filing: 1960-04-27
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Granted: 1962-12-25
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Expires: 1980-04-27
Abstract
No abstract record available.
Inventors
- 👤 Warner L Stewart
- 👤 David G Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:41
CPC Classifications
F; F01; F01D; F01D1/00; F01D1/02; F01D1/12; F05; F05D; F05D2220/00; F05D2220/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US816020A
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US911576A
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US2419689A
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AU128026B2
Cited
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Cited
DE933363C
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |