US3714804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shutter structure
Assignee: Individual
•
Filing: 1971-11-04
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Granted: 1973-02-06
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Expires: 1991-11-04
Abstract
Abstract APPARATUS FOR INCREASING THE SECURITY OF EXISTING DOOR LOCK INSTALLATIONS BY RENDERING THE SAME IMPERVIOUS TO PICKING. THE APPARATUS INCLUDES AN ARMORED COVER PLATE AND SHUTTER MECHANISM ADAPTED TO PREVENT THE EFFECTIVE APPLICATION OF PICKING TORQUES TO THE LOCK PLUG, AND INCLUDES NOVEL KEY MEANS AND AN OPERATOR THEREON, AND AN AUXILIARY LOCKING PROVISION WHICH BARS OPERATION OF THE LOCK EVEN BY PERSONS HAVING A PROPERLY FITTING KEY.
Inventors
- 👤 W French
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:51
CPC Classifications
E; E05; E05B; E05B17/00; E05B17/14; E05B17/142; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/778; Y10T70/7791; Y10T70/7802; Y10T70/7915; Y10T70/7932; Y10T70/7955; Y10T70/80; Y10T70/8432; Y10T70/8649
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) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |