US3605562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic relay
Assignee: Individual
•
Filing: 1968-11-20
•
Granted: 1971-09-20
•
Expires: 1988-11-20
Abstract
Abstract THE HYDRAULIC RELAY HAS A HYDRAULIC CONTROL DEVICE OPERABLE BY VARIABLE MEANS AND WHICH DEVICE IS CONSTANTLY UNDER THE INFLUENCE OF THE HYDRAULIIC PRESSURE OF AN OPERATING CYLINDER CONNECTED THERETO, IN A DIRECTION OPPOSITE TO THE CONTROL FORCE ACTING TO OPEN THE PRESSURE MEDIUM SUPPLIED TO THE OPERATING CYLINDER.
Inventors
- 👤 Kai Ludvig Larsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:10
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/08; F15B11/10; F15B5/00; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2607
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |