Patent US3447564A successfully refreshed from Google Patents.
US3447564A
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US
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Leakproof valve
Assignee: Brunswick Corp
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Filing: 1967-05-31
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Granted: 1969-06-03
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Expires: 1987-05-31
Abstract
No abstract record available.
Inventors
- 👤 Irving W North
- 👤 William L Woodfill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:28
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/04; F16K15/044; F16K15/042; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7879; Y10T137/7904; Y10T137/7922; Y10T137/7927; Y10T137/7928
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US143294A
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US434823A
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US2545000A
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US2664266A
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US2896664A
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US3077204A
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US3292897A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |