Patent US2579538A successfully refreshed from Google Patents.
US2579538A
Expired / Lapsed
US
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Electrical outlet with insulating closures
Assignee: Individual
•
Filing: 1948-02-19
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Granted: 1951-12-25
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Expires: 1968-02-19
Abstract
No abstract record available.
Inventors
- 👤 Burton B Bierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:06
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/44; H01R13/447; H01R13/453
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1288922A
Cited
US1522574A
Cited
DE492268C
Cited
GB364797A
Cited
GB377352A
Cited
GB435330A
Cited
DE658827C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |