US2646206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary piston air pump
Assignee: Micafil AG
•
Filing: 1948-12-08
•
Granted: 1953-07-21
•
Expires: 1968-12-08
Abstract
No abstract record available.
Inventors
- 👤 Bram Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:35
CPC Classifications
F; F04; F04C; F04C27/00; F04C27/02; Y; Y10; Y10S; Y10S418/00; Y10S418/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR742876A
Cited
GB191006938A
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US1142544A
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US1346165A
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US1352750A
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US1615824A
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US1558788A
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US1732039A
Cited
US1781095A
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US1967033A
Cited
US1970033A
Cited
US2138664A
Cited
GB480993A
Cited
CH223375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |