US2468079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relief valve
Assignee: HYDRAULIC EQUIPMENT Co
•
Filing: 1943-06-21
•
Granted: 1949-04-26
•
Expires: 1963-06-21
Abstract
No abstract record available.
Inventors
- 👤 Kirkham Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:37
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/048; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7925
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US572297A
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US715706A
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US1114978A
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US1620321A
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US1785807A
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US1980478A
Cited
US1994320A
Cited
US2200824A
Cited
US2317332A
Cited
US2286027A
Cited
US2333522A
Cited
US2308753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-25 | 1952-10-25 | 1953-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-25 | 1956-10-25 | 1957-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-25 | 1960-10-25 | 1961-04-26 | $7700.00 | Window Closed / Lapsed |