US3478647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for hydraulically operable devices,especially hydraulic dredges
Assignee: Orenstein Koppel und Luebecker Maschinenbau AG
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Filing: 1968-03-11
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Granted: 1969-11-18
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Expires: 1988-03-11
Abstract
No abstract record available.
Inventors
- 👤 Jurgen Gerber
- 👤 Friedrich Fichtner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:22
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/20; E02F9/22; E02F9/2221; F; F15; F15B; F15B11/00; F15B11/16; F15B11/17; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/2053; F15B2211/20546; F15B2211/30; F15B2211/305; F15B2211/30505; F15B2211/31; F15B2211/3105; F15B2211/3116; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7053; F15B2211/7058; F15B2211/71; F15B2211/7142
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) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |