Patent US5350406A successfully refreshed from Google Patents.
US3040973A
Expired / Lapsed
US
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Vacuum pump
Assignee: Precision Scientific Co
•
Filing: 1958-12-02
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Granted: 1962-06-26
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Expires: 1978-12-02
Abstract
No abstract record available.
Inventors
- 👤 Kenneth F Wessling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:59
CPC Classifications
F; F04; F04C; F04C29/00; F04C29/12; F04C29/124; F04C29/126; F04C29/128; F04C23/00; F04C23/001; F16; F16K; F16K15/00; F16K15/14; F16K15/16; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7869
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2759664A
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US2816702A
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US2831631A
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US2877946A
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US2984186A
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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) | 1965-06-25 | 1965-12-25 | 1966-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-25 | 1969-12-25 | 1970-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-25 | 1973-12-25 | 1974-06-26 | $7700.00 | Window Closed / Lapsed |