US3566636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically operable locking device
Assignee: Gerhard Riegraf KG
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Filing: 1968-12-09
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Granted: 1971-03-02
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Expires: 1988-12-09
Abstract
Abstract A MAGNETICALLY OPERABLE LOCKING DEVICE HAVING LATCHING MEANS IN A HOUSING, A SPRING LOADED DETENT MEANS OF MAGNETICALLY INFLUENCED MATERIAL AND MAGNETIC MEANS FOR RELEASING THE DETENT. THE MAGNETIC MEANS EXERTS A MAGNETIC FIELD FORCE LARGE ENOUGH TO INCLUDE A MAGNETIZABLE ROLLER, THE LENGTH OF THE FORCE BEING ONLY SLIGHTLY LARGER THAN THE DISTANCE REQUIRED TO MOVE THE LATCH TO AN UNLOCKED POSITION.
Inventors
- 👤 Hans Rudolf
- 👤 Gerhard Riegraf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:26
CPC Classifications
E; E05; E05B; E05B47/00; E05B47/0038; E05B47/0045; E05B47/004; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7051; Y10T70/7057; Y10T70/7441; Y10T70/7751; Y10T70/778; Y10T70/7791; Y10T70/7904
Claims Analysis
Total Claims: 0
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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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |