Patent US3032258A successfully refreshed from Google Patents.
US3032258A
Expired / Lapsed
US
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Vacuum pumps
Assignee: Nash Engineering Co
•
Filing: 1958-09-04
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Granted: 1962-05-01
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Expires: 1978-09-04
Abstract
No abstract record available.
Inventors
- 👤 Irving C Jennings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:00
CPC Classifications
F; F04; F04C; F04C19/00; F04C19/004; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/85954
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE522920A
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US1475504A
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US2098378A
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US2061013A
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US2287130A
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US2452550A
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US2341122A
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US2582802A
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US2743909A
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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) | 1965-04-30 | 1965-10-30 | 1966-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-30 | 1969-10-30 | 1970-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-30 | 1973-10-30 | 1974-05-01 | $7700.00 | Window Closed / Lapsed |