Patent US2704831A successfully refreshed from Google Patents.
US2704831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric outlet having means to lock the prongs of an attachment plug therein
Assignee: Individual
•
Filing: 1954-05-24
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Granted: 1955-03-22
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Expires: 1974-05-24
Abstract
No abstract record available.
Inventors
- 👤 Wilbur R Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:13
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/66; H01R13/70; H01R13/71
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1669666A
Cited
US1657004A
Cited
US1774230A
Cited
US2040113A
Cited
US2175472A
Cited
US2215316A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-21 | 1958-09-20 | 1959-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-21 | 1962-09-20 | 1963-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-21 | 1966-09-20 | 1967-03-22 | $7700.00 | Window Closed / Lapsed |