Patent US2234278A successfully refreshed from Google Patents.
US2628014A
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US
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Multiple stage nonslip vacuum pump
Assignee: MAX RASKIN
•
Filing: 1950-08-17
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Granted: 1953-02-10
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Expires: 1970-08-17
Abstract
No abstract record available.
Inventors
- 👤 Pemmerl Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:45
CPC Classifications
F; F04; F04C; F04C23/00; F04C23/001; F04C18/00; F04C18/02; F04C18/063; F04C18/07; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/1836
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-10 | 1956-08-11 | 1957-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-10 | 1960-08-11 | 1961-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-10 | 1964-08-11 | 1965-02-10 | $7700.00 | Window Closed / Lapsed |