Patent US3563069A successfully refreshed from Google Patents.
US3563069A
Expired / Lapsed
US
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Safety lock for doors
Assignee: Individual
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Filing: 1969-07-07
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Granted: 1971-02-16
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Expires: 1989-07-07
Abstract
Abstract A SUPPLEMENTAL LOCKING DEVICE IS PROVIDED FOR A DOOR HAVING A DOOR KNOB CONSISTING OF A PAIR OF FRAMES WHICH ARE HINGED TOGETHER AND ATTACHABLE TO A DOOR OVER THE DOOR KNOB. LOCK MEANS ARE PROVIDED TO SECURE THE PAIR OF FRAMES TOGETHER AND WHEN SO SECURED THE DOOR KNOB IS INACCESSIBLE. THE SUPPLENENTAL LOCKING DEVICE ALSO INCLUDES A SLIDE BOLT CARRIED BY THE DOOR ATTACHED FRAME WHICH SLIDE BOLT IS SIMILARLY INACCESSIBLE WHEN THE PAIR OF FRAMES ARE LOCKED TOGETHER.
Inventors
- 👤 Armando Ferrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:52
CPC Classifications
E; E05; E05B; E05B13/00; E05B13/001; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/1014; Y10T292/1022; Y10T292/1028; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5199; Y10T70/5226; Y10T70/5246; Y10T70/5296; Y10T70/5319; Y10T70/5611; Y10T70/5757; Y10T70/5765; Y10T70/80; Y10T70/8865
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |