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Patent US2743425A successfully refreshed from Google Patents.
US2743425A
Expired / Lapsed
US
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Safety lock for electric plugs
Assignee: Individual
•
Filing: 1950-11-09
•
Granted: 1956-04-24
•
Expires: 1970-11-09
Abstract
No abstract record available.
Inventors
- 👤 Perrault Art
- 👤 Charles V Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:18
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/62; H01R13/639
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1520421A
Cited
US1635507A
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US2005475A
Cited
US2046221A
Cited
US2199560A
Cited
DE721168C
Cited
US2240050A
Cited
US2266560A
Cited
US2569037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |