US3474824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dump valve for hydraulic control system
Assignee: Deere and Co
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Filing: 1968-01-17
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Granted: 1969-10-28
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Expires: 1988-01-17
Abstract
No abstract record available.
Inventors
- 👤 Billy Bert Roy
- 👤 Stanley Martin Gregerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:15
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/08; F15B13/00; F15B13/02; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/2053; F15B2211/20538; F15B2211/30; F15B2211/305; F15B2211/30505; F15B2211/30525; F15B2211/31; F15B2211/3105; F15B2211/3111; F15B2211/315; F15B2211/31523; F15B2211/31529; F15B2211/32; F15B2211/321; F15B2211/325; F15B2211/40; F15B2211/405; F15B2211/40507; F15B2211/415; F15B2211/41509; F15B2211/50; F15B2211/505; F15B2211/50563; F15B2211/50572; F15B2211/515; F15B2211/5157; F15B2211/52; F15B2211/528; F15B2211/60; F15B2211/635; F15B2211/6355; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/8593; Y10T137/87169; Y10T137/87177; Y10T137/87185
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) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |