US3129579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Latchbolt holdback for doorlocks
Assignee: Emhart Industries Inc
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Filing: 1962-02-01
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Granted: 1964-04-21
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Expires: 1982-02-01
Abstract
No abstract record available.
Inventors
- 👤 Morris P Bellantuono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:38
CPC Classifications
E; E05; E05B; E05B63/00; E05B63/18; Y; Y10; Y10T; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5199; Y10T70/5226; Y10T70/5239; Y10T70/5372; Y10T70/5385; Y10T70/5389; Y10T70/55
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
IN A DOOR LOCK INCLUDING A LATCHBOLT MOVABLE BETWEEN A PROJECTED, LATCHING POSITION AND A RETRACTED, UNLATCHED POSITION, SPRING MEANS BIASING SAID LATCHBOLT TOWARD PROJECTED POSITION AND AN ABUTMENT ON SAID LATCHBOLT; THE COMBINATION OF: A HOLDBACK MEMBER MOVABLE BETWEEN A NORMAL POSITION CLEAR OF SAID ABUTMENT AND A LATCHBOLT HOLDBACK POSITION ENGAGED WITH SAID ABUTMENT WHEN SAID LATCHBOLT IS RETRACTED FOR HOLDING SAID LATCHBOLT IN RETRACTED POSITION AGAINST THE BIAS OF SAID SPRING MEANS, MEANS BIASING SAID HOLDBACK MEMBER TOWARD LATCHBOLT HOLDBACK POSITION, STOP MEANS FOR RETAINING SAID HOLDBACK
Claim 2
Dependent Claim
90 words
IN A DOOR LOCK INCLUDING A LATCHBOLT MOVABLE BETWEEN A PROJECTED, LATCHING POSITION AND A RETRACTED, UNLATCHED POSITION, SPRING MEANS BIASING SAID LATCHBOLT TOWARD PROJECTED POSITION AND AN ABUTMENT ON SAID LATCHBOLT; THE COMBINATION OF: A HOLDBACK MEMBER MOVABLE BETWEEN A NORMAL POSITION CLEAR OF SAID ABUTMENT AND A LATCHBOLT HOLDBACK POSITION ENGAGED WITH SAID ABUTMENT WHEN SAID LATCHBOLT IS RETRACTED FOR HOLDING SAID LATCHBOLT IN RETRACTED POSITION AGAINST THE BIAS OF SAID SPRING MEANS, MEANS BIASING SAID HOLDBACK MEMBER TOWARD LATCHBOLT HOLDBACK POSITION, STOP MEANS FOR RETAINING SAID HOLDBACK
References Cited (Backward Citations)
US2089145A
Cited
US2664736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |