US3086384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Key lock accessory
Assignee: Individual
•
Filing: 1959-10-30
•
Granted: 1963-04-23
•
Expires: 1979-10-30
Abstract
No abstract record available.
Inventors
- 👤 Joseph W Wyche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:15
CPC Classifications
E; E05; E05B; E05B17/00; E05B17/0016; Y; Y10; Y10T; Y10T70/00; Y10T70/80; Y10T70/8432
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
83 words
A FREEZE-PREVENTING DEVICE FOR A KEY LOCK COMPRISING, IN COMBINATION, A PIPE HAVING AN EXTENSION OF FLAT, NARROW CONFIGURATION AND HAVING A SERRATED EDGE, AND OF A LENGTH, SHAPE AND SIZE AS TO FIT INTO THE KEYHOLE OF A DOOR LOCK, SAID EXTENSION BEING PROVIDED WITH OPENINGS IN COMMUNICATION WITH SAID PIPE, LIQUID IN SAID PIPE HAVING A FREEZING TEMPERATURE LOWER THAN THAT OF WATER AND MEANS FOR APPLYING PRESSURE TO SAID LIQUID WHEN THE KEY EXTENSION IS INSERTED INTO SAID KEY LOCK.
References Cited (Backward Citations)
US621875A
Cited
US1484757A
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US1685154A
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US2017422A
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US2252119A
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US2638611A
Cited
FR1133441A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |