Patent DE399582C successfully refreshed from Google Patents.
US2415750A
Expired / Lapsed
US
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Hydraulic relief valve
Assignee: Parker Appliance Co
•
Filing: 1943-12-30
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Granted: 1947-02-11
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Expires: 1963-12-30
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Melichar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:02
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/0473; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7834
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1011314A
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US1767841A
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US1870927A
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US1970131A
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US2249206A
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US2280937A
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US2295931A
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US2308753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-10 | 1950-08-12 | 1951-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-10 | 1954-08-12 | 1955-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-10 | 1958-08-12 | 1959-02-11 | $7700.00 | Window Closed / Lapsed |