US2814307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pilot controlled main valve with cushioning means
Assignee: Sempell GmbH
•
Filing: 1953-12-04
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Granted: 1957-11-26
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Expires: 1973-12-04
Abstract
No abstract record available.
Inventors
- 👤 Hafele Carl Heinz
- 👤 M Gladbach
- 👤 Kreuz Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:22
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/12; F16K1/126; F16K47/00; F16K47/01; F16K47/011; F16K47/0111; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7764
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE173665C
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US611053A
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US793788A
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US1466412A
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US1829703A
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US1511009A
Cited
US1598166A
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US1646640A
Cited
GB480742A
Cited
US2590466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-25 | 1961-05-27 | 1961-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-25 | 1965-05-27 | 1965-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-25 | 1969-05-27 | 1969-11-26 | $7700.00 | Window Closed / Lapsed |