US2759664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-stage pump, in particular a vacuum pump
Assignee: ALOIS VOGT DR
•
Filing: 1950-05-06
•
Granted: 1956-08-21
•
Expires: 1970-05-06
Abstract
No abstract record available.
Inventors
- 👤 Auwarter Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:30
CPC Classifications
F; F04; F04C; F04C27/00; F04C27/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US462453A
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US2126553A
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US848446A
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US1237668A
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CH80874A
Cited
US1468889A
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US1648985A
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US1607383A
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US2077394A
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US2368572A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |