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Patent US2864394A successfully refreshed from Google Patents.
US2864394A
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Automatic relief valve
Assignee: Mcdowell Manufacturing Co
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Filing: 1954-05-27
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Granted: 1958-12-16
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Expires: 1974-05-27
Abstract
No abstract record available.
Inventors
- 👤 Gustav A Hempel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:28
CPC Classifications
A; A01; A01G; A01G25/00; A01G25/16; F; F16; F16K; F16K15/00; F16K15/14; F16K15/16; F16K24/00; F16K24/04; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7869; Y10T137/7875; Y10T137/7879; Y10T137/7888; Y10T137/7891; Y10T137/7898
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US436616A
Cited
US2512694A
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DE545646C
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FR801926A
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FR808192A
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US2476320A
Cited
US2661764A
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US2730115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-15 | 1962-06-16 | 1962-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-15 | 1966-06-16 | 1966-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-15 | 1970-06-16 | 1970-12-16 | $7700.00 | Window Closed / Lapsed |