Patent US3434390A successfully refreshed from Google Patents.
US3434390A
Expired / Lapsed
US
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Valve control apparatus
Assignee: Ambac International Corp
•
Filing: 1966-04-25
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Granted: 1969-03-25
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Expires: 1986-04-25
Abstract
No abstract record available.
Inventors
- 👤 Paul C Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:23
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B13/0436; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/8659; Y10T137/86614
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2704649A
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US2912008A
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US2931389A
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US2983278A
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US2967545A
Cited
US2977985A
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US3318332A
Cited
GB957900A
Cited
US3269417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |