US3570285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auxiliary door lock
Assignee: 3M Co
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Filing: 1969-02-20
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Granted: 1971-03-16
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Expires: 1989-02-20
Abstract
Abstract AN AUXILIARY LOCK FOR TWO RELATIVELY MOVABLE BUILDING MEMBERS COMPRISING A SLIDABLE BOLT MOVABLE INTO LOCKING POSITION UPON CLOSURE OF THE MEMBERS AND OPERATION OF AN EXISTING LOCK OF A CONVENTIONAL TYPE. THE AUXILIARY LOCK OF THE PRESENT INVENTION ALSO HAS A KEY-OPERATED LOCKING DEVICE TO MAINTAIN THE BOLT OF THE AUXILIARY LOCK IN CLOSED POSITION EVEN UPON SUBSEQUENT DISABLING OF THE CONVENTIONAL LOCK. THE LOCK OF THE PRESENT INVENTION IS ALSO PROVIDED WITH SIGNALING MEANS ACTUATABLE IN THE EVENT ONE ATTAMPTS TO SEPARATE THE CLOSURE MEMBERS BY EXERTING FORCE UPON ONE OR THE OTHER OF THE MEMBERS WITH THE LOCK IN SECURED POSITION.
Inventors
- 👤 Paul M Hawkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:18
CPC Classifications
E; E05; E05B; E05B63/00; E05B63/24; Y; Y10; Y10T; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5199; Y10T70/5226; Y10T70/60; Y10T70/80; Y10T70/8027; Y10T70/827
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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |