US3481529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for pumping with a liquid-ring in series with a jet ejector
Assignee: Siemens AG
•
Filing: 1967-05-09
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Granted: 1969-12-02
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Expires: 1987-05-09
Abstract
No abstract record available.
Inventors
- 👤 Kurt Willy Mugele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:26
CPC Classifications
F; F04; F04C; F04C19/00; F04C19/004; Y; Y10; Y10S; Y10S159/00; Y10S159/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1100694A
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DE946916C
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US3315879A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-01 | 1973-06-02 | 1973-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-01 | 1977-06-02 | 1977-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-01 | 1981-06-02 | 1981-12-02 | $7700.00 | Window Closed / Lapsed |