Patent US3057546A successfully refreshed from Google Patents.
US3057546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary vacuum pumps
Assignee: Edwards High Vacuum Ltd
•
Filing: 1958-01-29
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Granted: 1962-10-09
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Expires: 1978-01-29
Abstract
No abstract record available.
Inventors
- 👤 Power Basil Dixon
- 👤 Runki Alfred Aristides
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:54
CPC Classifications
F; F04; F04C; F04C29/00; F04C29/02; F04C29/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2246278A
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US2138664A
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US2215256A
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US2285426A
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US2370581A
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US2439258A
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US2722395A
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US2779533A
Cited
GB785203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |