Patent CA1165285A successfully refreshed from Google Patents.
Patent US6639893B1 successfully refreshed from Google Patents.
US3020018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Discharge valve
Assignee: Capitol Products Corp
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Filing: 1959-03-23
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Granted: 1962-02-06
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Expires: 1979-03-23
Abstract
No abstract record available.
Inventors
- 👤 Stram George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:01
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/16; F16K31/163
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US962100A
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US1179922A
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US1615273A
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US1772578A
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US1950630A
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US2241316A
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US2256891A
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US2290527A
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US2403536A
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FR968477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |