US2991926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined fan and turbine
Assignee: RTX Corp
•
Filing: 1954-12-29
•
Granted: 1961-07-11
•
Expires: 1974-12-29
Abstract
No abstract record available.
Inventors
- 👤 William E Diefenderfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:15
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/18; F01D25/183; F01D25/16; F04; F04D; F04D25/00; F04D25/02; F04D25/04; F16; F16C; F16C33/00; F16C33/72; F16C33/76; F16C19/00; F16C19/54; F16C19/546; F16C19/547; F16C19/548; F16C25/00; F16C25/06; F16C25/08; F16C25/083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1076142A
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US1181780A
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US1624529A
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US1864027A
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US2072656A
Cited
US2159422A
Cited
US2322824A
Cited
US2323725A
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US2359177A
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US2447292A
Cited
US2664323A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |