Patent CA856333A successfully refreshed from Google Patents.
US3456684A
Expired / Lapsed
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Automatic valve
Assignee: ENFO Grundlagen Forschungs AG
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Filing: 1964-06-30
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Granted: 1969-07-22
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Expires: 1984-06-30
Abstract
No abstract record available.
Inventors
- 👤 Franz Sochting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:44
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/025; F16K15/026; F16K15/028; F04; F04B; F04B39/00; F04B39/10; F04B39/102; F04B39/1033; F16F; F16F1/00; F16F1/02; F16F1/04; F16F1/08; F16K15/08; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7936
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) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |