Patent US2700936A successfully refreshed from Google Patents.
US2700936A
Expired / Lapsed
US
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Flexible helix rotor pump
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1951-10-05
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Granted: 1955-02-01
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Expires: 1971-10-05
Abstract
No abstract record available.
Inventors
- 👤 Sackett James Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:45
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/10; F04C2/107; F04C2/1071
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2028407A
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US2293268A
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US2401189A
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US2527536A
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US2512764A
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US2542268A
Cited
US2527673A
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US2499163A
Cited
US2612845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-31 | 1958-08-02 | 1959-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-31 | 1962-08-02 | 1963-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-31 | 1966-08-02 | 1967-02-01 | $7700.00 | Window Closed / Lapsed |