Patent US2542628A successfully refreshed from Google Patents.
US2542628A
Expired / Lapsed
US
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Turbojet propulsion apparatus with separate combustion discharge jets
Assignee: Individual
•
Filing: 1946-10-25
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Granted: 1951-02-20
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Expires: 1966-10-25
Abstract
No abstract record available.
Inventors
- 👤 Elbert E Christopher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:26
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/26; F02C3/00; F02C3/04; F02C3/08; F02C3/085; F02C6/00; F02C6/003; F23; F23R; F23R3/00; Y; Y02; Y02T; Y02T50/00; Y02T50/60
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) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |