Patent US3068894A successfully refreshed from Google Patents.
US3068894A
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Pressure relief valve for tractor hydraulic systems
Assignee: Massey Ferguson Inc
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Filing: 1959-11-03
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Granted: 1962-12-18
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Expires: 1979-11-03
Abstract
No abstract record available.
Inventors
- 👤 Ernest V Bunting
- 👤 Glennard T Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:33
CPC Classifications
A; A01; A01B; A01B63/00; A01B63/02; A01B63/10; A01B63/1006; A01B63/1013; F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/048; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/785; Y10T137/7904; Y10T137/7922; Y10T137/7925
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2164669A
Cited
US2364812A
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US2361881A
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US2970467A
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US2888947A
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FR1149979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |