US3483890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multispool control valve with limited series operation
Assignee: Caterpillar Inc
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Filing: 1967-06-15
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Granted: 1969-12-16
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Expires: 1987-06-15
Abstract
No abstract record available.
Inventors
- 👤 Dorrance Oldenburg
- 👤 James E Scheidt
- 👤 Donald L Shook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:07
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/42; E02F3/43; E02F3/431; E02F3/432; E02F3/422; F; F15; F15B; F15B11/00; F15B11/16; F15B13/00; F15B13/02; F15B13/06; F15B13/08; F15B2211/00; F15B2211/30; F15B2211/305; F15B2211/30505; F15B2211/31; F15B2211/3105; F15B2211/3116; F15B2211/32; F15B2211/321; F15B2211/324; F15B2211/60; F15B2211/615; F15B2211/70; F15B2211/71; F15B2211/78; F15B2211/781; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87169; Y10T137/87177
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-15 | 1973-06-16 | 1973-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-15 | 1977-06-16 | 1977-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-15 | 1981-06-16 | 1981-12-16 | $7700.00 | Window Closed / Lapsed |