Patent US3300240A successfully refreshed from Google Patents.
US3300240A
Expired / Lapsed
US
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Latch extension device
Assignee: Schlage Lock Co LLC
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Filing: 1964-09-21
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Granted: 1967-01-24
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Expires: 1984-09-21
Abstract
No abstract record available.
Inventors
- 👤 John A Tornoe
- 👤 Ralph E Neary
- 👤 Fernandez-Castro Lizandro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:48
CPC Classifications
E; E05; E05B; E05B63/00; E05B63/06; Y; Y10; Y10T; Y10T292/00; Y10T292/06; Y10T292/62
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
145 words
A BACKSET EXTENSION DEVICE COMPRISING: AN ELONGATED HOUSING ADAPTED TO BE INTERPOSED BETWEEN THE COOPERATING LATCHBOLT ACTUATING UNIT AND THE LATCHBOLT UNIT OF A STANDARD LOCKSET, A PAIR OF ELONGATED LINKS RECIPROCALLY SUPPORTED FOR AXIAL MOVEMENT ALONGSIDE EACH OTHER IN SAID HOUSING, SAID EACH LINKS BEING FORMED AT ONE OF THEIR CORRESPONDING ENDS FOR CONNECTION TO A RETRACTOR SLIDE OF SAID ACTUATING UNIT TO PERMIT SAID SLIDE TO PULL SAID PAIR IN UNISON AWAY FROM SAID LATCHBOLT UNIT, ONE OF SAID LINKS BEING FORMED AT ITS OTHER END FOR CONNECTION WITH THE LATCHBAR OF SAID LATCHBOLT UNIT TO PERMIT SAID LATCHBAR TO BE PULLED BY SAID ONE LINK TO RETRACTED POSITION, THE OTHER OF SAID LINKS BEING FORMED AT ITS OTHER END TO PROVIDE AN AXIALLY FACING SURFACE POSITIONED TO BE ABUTTED BY THE INNER END OF SAID LATCHBAR UPON DEPRESSION OF THE ASSOCIATED LATCHBOLT.
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) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |