Patent US2915224A successfully refreshed from Google Patents.
US2915224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vented valve
Assignee: LINDEN H CHANDLER
•
Filing: 1956-10-02
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Granted: 1959-12-01
•
Expires: 1976-10-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Richard W Beall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:54
CPC Classifications
F; F16; F16K; F16K24/00; F16K24/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2445130A
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US2518349A
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US2601557A
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US2639839A
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US2724535A
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US2756910A
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US2730273A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |