US2589971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determining flame blowout in jet engines
Assignee: Standard Oil Development Co
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Filing: 1949-06-16
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Granted: 1952-03-18
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Expires: 1969-06-16
Abstract
No abstract record available.
Inventors
- 👤 Charles W Skarstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:18
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/26; F02C7/262; F05; F05D; F05D2270/00; F05D2270/30; F05D2270/301
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) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |