US2929550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pumps and valves therefor
Assignee: N G N ELECTRICAL Ltd
•
Filing: 1956-03-02
•
Granted: 1960-03-22
•
Expires: 1976-03-02
Abstract
No abstract record available.
Inventors
- 👤 Sadler Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:50
CPC Classifications
F; F04; F04C; F04C29/00; F04C29/12; F04C29/124; F04C29/126; F04C29/128; F04C18/00; F04C18/30; F04C18/32; F04C18/324; F04C27/00; F04C27/02; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/788
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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FR559438A
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US1969999A
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US2191345A
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US2169131A
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US2165620A
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US2201837A
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US2334032A
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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) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |