Patent CA519553A successfully refreshed from Google Patents.
Patent US1951403A successfully refreshed from Google Patents.
US2657530A
Expired / Lapsed
US
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Control apparatus for turbojet engines
Assignee: Niles Bement Pond Co
•
Filing: 1947-11-21
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Granted: 1953-11-03
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Expires: 1967-11-21
Abstract
No abstract record available.
Inventors
- 👤 Ii Leighton Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:27
CPC Classifications
F; F02; F02C; F02C3/00; F02C3/20; F02C3/30; F02C9/00; F02C9/16; Y; Y10; Y10T; Y10T137/00; Y10T137/6198; Y10T137/6253
Claims Analysis
Total Claims: 0
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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) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |