Patent US2857133A successfully refreshed from Google Patents.
US2857133A
Expired / Lapsed
US
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Turbine apparatus
Assignee: Westinghouse Electric Corp
•
Filing: 1953-05-13
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Granted: 1958-10-21
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Expires: 1973-05-13
Abstract
No abstract record available.
Inventors
- 👤 Burke Edward
- 👤 George A Kemeny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:03
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/18; F01D5/185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2675672A
Cited
GB531445A
Cited
US2457833A
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US2585871A
Cited
GB615689A
Cited
US2653446A
Cited
US2549819A
Cited
US2647368A
Cited
US2625793A
Cited
GB671228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |