Patent US3125875A successfully refreshed from Google Patents.
US3125875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chain door lock
Assignee: —
•
Filing: —
•
Granted: 1964-03-24
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Expires: 1981-03-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:31
CPC Classifications
E; E05; E05C; E05C17/00; E05C17/02; E05C17/04; E05C17/36; E05C17/365; Y; Y10; Y10T; Y10T292/00; Y10T292/28; Y10T292/283; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5164
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
IN A CHAIN FOR DOOR LOCK HAVING A SLIDE PLATE, A SLOT IN SAID SLIDE PLATE, A SLIDE MOVABLE INTO AND OUT OF SAID SLOT FOR ENGAGEMENT WITH AND DISENGAGEMENT FROM SAID SLIDE PLATE, A CHAIN CONNECTED AT ITS ONE END WITH SAID SLIDE; A LOCK MECHANISM COMPRISING A HOUSING HAVING A FIRST HOLE WITH A BLIND END DEFINED THEREIN, A LATCH BOLT CONNECTED WITH SAID SLIDE AT THE OTHER END OF SAID CHAIN AND MOVABLE INTO AND OUT OF SAID FIRST HOLE, A MOVABLE KEEPER IN A SECOND HOLE IN SAID HOUSING TRANSVERSE TO SAID FIRST HOLE, SPRING
Claim 2
Dependent Claim
99 words
IN A CHAIN FOR DOOR LOCK HAVING A SLIDE PLATE, A SLOT IN SAID SLIDE PLATE, A SLIDE MOVABLE INTO AND OUT OF SAID SLOT FOR ENGAGEMENT WITH AND DISENGAGEMENT FROM SAID SLIDE PLATE, A CHAIN CONNECTED AT ITS ONE END WITH SAID SLIDE; A LOCK MECHANISM COMPRISING A HOUSING HAVING A FIRST HOLE WITH A BLIND END DEFINED THEREIN, A LATCH BOLT CONNECTED WITH SAID SLIDE AT THE OTHER END OF SAID CHAIN AND MOVABLE INTO AND OUT OF SAID FIRST HOLE, A MOVABLE KEEPER IN A SECOND HOLE IN SAID HOUSING TRANSVERSE TO SAID FIRST HOLE, SPRING
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-24 | 1967-09-23 | 1968-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-24 | 1971-09-23 | 1972-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-24 | 1975-09-23 | 1976-03-24 | $7700.00 | Window Closed / Lapsed |