Patent US2989986A successfully refreshed from Google Patents.
US2989986A
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Hydraulic control valve for actuating steering clutches or the like
Assignee: Caterpillar Inc
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Filing: 1958-04-25
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Granted: 1961-06-27
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Expires: 1978-04-25
Abstract
No abstract record available.
Inventors
- 👤 James L Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:11
CPC Classifications
F; F16; F16D; F16D48/00; F16D48/02; B; B62; B62D; B62D11/00; B62D11/02; B62D11/06; B62D11/08; F15; F15B; F15B13/00; F15B13/02; F15B13/06; F15B13/08; F16D25/00; F16D25/12; F16D25/14; F16K; F16K27/00; F16K27/04; F16K27/041; F16D2048/0209; F16D2048/0221; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87169; Y10T137/87233
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2247141A
Cited
US2392422A
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US2483651A
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US2501328A
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US2586932A
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US2837167A
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US2804883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |