Patent US2898731A successfully refreshed from Google Patents.
US2898731A
Expired / Lapsed
US
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Power producing equipment incorporating gas turbine plant
Assignee: Power Jets Research and Development Ltd
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Filing: 1954-09-08
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Granted: 1959-08-11
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Expires: 1974-09-08
Abstract
No abstract record available.
Inventors
- 👤 Barr John Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:02
CPC Classifications
F; F02; F02B; F02B37/00; F02B37/04; F02B37/10; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2731798A
Cited
US999976A
Cited
GB387264A
Cited
US2263370A
Cited
US2375006A
Cited
US2580591A
Cited
US2633698A
Cited
US2654991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |