Patent US2581430A successfully refreshed from Google Patents.
US2581430A
Expired / Lapsed
US
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Fluid pressure control valve and associated parts
Assignee: Caterpillar Global Mining LLC
•
Filing: 1946-01-23
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Granted: 1952-01-08
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Expires: 1966-01-23
Abstract
No abstract record available.
Inventors
- 👤 George W Mork
- 👤 Reuter Gottfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:55
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/20; E02F9/22; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86501; Y10T137/86879; Y10T137/86895; Y10T137/87169; Y10T137/87177
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |