US3425436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve structure for self-priming pumps
Assignee: PRIMAVAC SYSTEMS Inc A CORP OF NEW JERSEY
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Filing: 1966-06-10
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Granted: 1969-02-04
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Expires: 1986-06-10
Abstract
No abstract record available.
Inventors
- 👤 Pellegrino E Napolitano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:06
CPC Classifications
F; F04; F04D; F04D9/00; F04D9/004; F04D9/005; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/2557; Y10T137/7722; Y10T137/7837; Y10T137/7838
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) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |