US3253848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Latch bolt assembly with collapsible retractor
Assignee: National Lock Co
•
Filing: 1962-08-10
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Granted: 1966-05-31
•
Expires: 1982-08-10
Abstract
No abstract record available.
Inventors
- 👤 William B Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:53
CPC Classifications
E; E05; E05C; E05C1/00; E05C1/08; E05C1/12; E05C1/16; E05C1/163; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/0969; Y10T292/097; Y10T292/0977; Y10T292/098; Y10T292/0982; Y10T292/0989; Y10T292/0991; Y10T292/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
IN A DOOR LOCK HAVING A TUBULAR PART EXTENDING THROUGH A TRANSVERSE OPENING IN AND TO THE OPPOSITE SIDES OF THE DOOR WITH A KNOB AT EACH SIDE OF THE DOOR FOR TURNING OF THE TUBULAR PART AND A ROLL-BACK ON SAID PART WITHIN THE OPENING, AND A LATCH BOLT ASSEMBLY MOUNTED WITHIN AN APERTURE IN THE EDGE OF THE DOOR INCLUDING A TUBULAR HOUSING, A LATCH BOLT SLIDABLY MOUNTED IN THE FRONT OF SAID HOUSING, A TAIL PIECE PROVIDING A CLOSURE FOR THE REAR OF THE HOUSING, A BOLT BRACKET AND RETRACTOR HAVING SPACED LEGS OF FLAT METAL JOINED TOGETHER AT THEIR FORWARD END AND THEREAT AFFIXED TO THE LATCH BOLT, AN EXPANSION SPRING IN SAID HOUSING FOR SPRING-BIASING THE LATCH BOLT TO LATCHING POSITION, SAID LEGS PROJECTING REARWARDLY THROUGH THE HOUSING AND TAIL PIECE IN SPACED RELATION WITH EACH LEG REARWARDLY OF SAID HOUSING BEING BENT TO PROVIDE DIVERGING
Claim 2
Dependent Claim
151 words
IN A DOOR LOCK HAVING A TUBULAR PART EXTENDING THROUGH A TRANSVERSE OPENING IN AND TO THE OPPOSITE SIDES OF THE DOOR WITH A KNOB AT EACH SIDE OF THE DOOR FOR TURNING OF THE TUBULAR PART AND A ROLL-BACK ON SAID PART WITHIN THE OPENING, AND A LATCH BOLT ASSEMBLY MOUNTED WITHIN AN APERTURE IN THE EDGE OF THE DOOR INCLUDING A TUBULAR HOUSING, A LATCH BOLT SLIDABLY MOUNTED IN THE FRONT OF SAID HOUSING, A TAIL PIECE PROVIDING A CLOSURE FOR THE REAR OF THE HOUSING, A BOLT BRACKET AND RETRACTOR HAVING SPACED LEGS OF FLAT METAL JOINED TOGETHER AT THEIR FORWARD END AND THEREAT AFFIXED TO THE LATCH BOLT, AN EXPANSION SPRING IN SAID HOUSING FOR SPRING-BIASING THE LATCH BOLT TO LATCHING POSITION, SAID LEGS PROJECTING REARWARDLY THROUGH THE HOUSING AND TAIL PIECE IN SPACED RELATION WITH EACH LEG REARWARDLY OF SAID HOUSING BEING BENT TO PROVIDE DIVERGING
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |