US2939276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for variable area supersonic diffuser
Assignee: Marquardt Corp
•
Filing: 1954-02-24
•
Granted: 1960-06-07
•
Expires: 1974-02-24
Abstract
No abstract record available.
Inventors
- 👤 James C Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:09
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/04; F02C7/057
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2737015A
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US2677232A
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US2645240A
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US2638738A
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US2817209A
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US2864393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |