Patent DE824655C successfully refreshed from Google Patents.
US2187371A
Expired / Lapsed
US
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Prefill valve for hydraulic presses
Assignee: EW Bliss Co Inc
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Filing: 1936-11-20
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Granted: 1940-01-16
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Expires: 1956-11-20
Abstract
No abstract record available.
Inventors
- 👤 Cannon Earl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:17
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/16; B30B15/18; B30B15/183; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7869; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7932
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-01-15 | 1943-07-17 | 1944-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-01-15 | 1947-07-17 | 1948-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-01-15 | 1951-07-17 | 1952-01-16 | $7700.00 | Window Closed / Lapsed |