US2929547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for detection and prevention of overspeed and surge conditions in a compressor
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1955-03-08
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Granted: 1960-03-22
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Expires: 1975-03-08
Abstract
No abstract record available.
Inventors
- 👤 John K Koffel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:25
CPC Classifications
F; F04; F04D; F04D27/00; F04D27/02; F04D27/0261; Y; Y02; Y02B; Y02B30/00; Y02B30/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1655683A
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US2521244A
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US2463566A
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US2442049A
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US2689680A
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US2705047A
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US2705590A
Cited
US2790120A
Cited
FR1088725A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |