Patent US3456442A successfully refreshed from Google Patents.
US3456442A
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Automatic neutral valve
Assignee: Eaton Corp
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Filing: 1967-07-26
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Granted: 1969-07-22
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Expires: 1987-07-26
Abstract
No abstract record available.
Inventors
- 👤 Vern E Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:11
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/04; F16K15/044; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/4043; F16H61/42; F16K17/00; F16K17/20; F16K17/22; F16K17/24; F16K17/26; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2617; Y10T137/7722; Y10T137/7837; Y10T137/7866; Y10T137/7869
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US701754A
Cited
US2323352A
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US2526570A
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US2623725A
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US2706384A
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US2640323A
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US3228184A
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US3376703A
Cited
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 |