Patent US2421518A successfully refreshed from Google Patents.
US2421518A
Expired / Lapsed
US
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Jet propulsion
Assignee: RTX Corp
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Filing: 1940-07-05
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Granted: 1947-06-03
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Expires: 1960-07-05
Abstract
No abstract record available.
Inventors
- 👤 Richard C Molloy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:38
CPC Classifications
F; F02; F02K; F02K7/00; F02K7/08; F02C; F02C3/00; F02C3/04; F02C3/055
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1382535A
Cited
US958944A
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GB321933A
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FR696369A
Cited
GB454266A
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GB471177A
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FR818703A
Cited
US2169243A
Cited
US2164545A
Cited
US2216731A
Cited
FR844442A
Cited
GB513751A
Cited
US2385366A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-02 | 1950-12-02 | 1951-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-02 | 1954-12-02 | 1955-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-02 | 1958-12-02 | 1959-06-03 | $7700.00 | Window Closed / Lapsed |