US3476142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple check valve
Assignee: Eaton Corp
•
Filing: 1966-09-16
•
Granted: 1969-11-04
•
Expires: 1986-09-16
Abstract
No abstract record available.
Inventors
- 👤 Wilfred R Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:39
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/2366; B01F23/236; B01F23/2364; F16K15/148; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7866; Y10T137/7879; Y10T137/7888; Y10T137/789; Y10T137/8593; Y10T137/87917; Y10T137/88054
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US562267A
Cited
US1388602A
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US1566613A
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US1147840A
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US2181768A
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US2758609A
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US2784561A
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BE565731A
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US3010477A
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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) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |