US3134252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety lock for doors
Assignee: DOCK AND DOCK
•
Filing: 1961-05-01
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Granted: 1964-05-26
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Expires: 1981-05-01
Abstract
No abstract record available.
Inventors
- 👤 Albert E Mintz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:10
CPC Classifications
E; E05; E05C; E05C17/00; E05C17/02; E05C17/04; E05C17/36; E05C17/365; Y; Y10; Y10T; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5164
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
135 words
A SAFETY LOCK FOR DOORS FOR LOOSELY CONNECTING A DOOR TO THE ADJACENT DOOR-FRAME COMPRISING A CHAIN OF SUITABLE LENGTH WITH MEANS FOR ATTACHING ONE END OF THE CHAIN TO THE INSIDE OF THE DOOR, A PADLOCK, A SUPPORTING BRACKET FOR SAID PADLOCK ATTACHABLE TO SAID DOOR-FRAME, SAID PADLOCK HAVING A SHACKLE MEMBER AND A BODY MEMBER MOUNTED ON SAID SUPPORTING BRACKET, SAID BODY MEMBER BEING PIVOTALLY CONNECTED TO ONE END OF SAID SHACKLE MEMBER, SAID SHACKLE MEMBER BEING PIVOTALLY MOUNTED ON SAID BRACKET IN A POSITION IN WHICH SAID SHACKLE MEMBER IS FREE TO MOVE PIVOTALLY TOWARD AND AWAY FROM SAID BODY MEMBER SO THAT SAID OTHER END OF THE CHAIN MAY ENGAGE SAID SHACKLE MEMBER AND BE LOCKED TO OR RELEASED THEREFROM WHEN THE PADLOCK IS OPERATED BY A PERSON OUTSIDE THE DOOR.
References Cited (Backward Citations)
GB191122135A
Cited
GB191221844A
Cited
US1419864A
Cited
GB354647A
Cited
US2613970A
Cited
US2881611A
Cited
US3081616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |