Patent US2674722A successfully refreshed from Google Patents.
US2674722A
Expired / Lapsed
US
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Locking means and ground connection for electrical plugs
Assignee: Harvey Hubbell Inc
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Filing: 1950-03-03
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Granted: 1954-04-06
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Expires: 1970-03-03
Abstract
No abstract record available.
Inventors
- 👤 Hubbell Harvey
- 👤 Joseph F Healy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:01
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1144225A
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US1509839A
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US1891153A
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US1782527A
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US1967021A
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US2049093A
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US2410618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-05 | 1957-10-05 | 1958-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-05 | 1961-10-05 | 1962-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-05 | 1965-10-05 | 1966-04-06 | $7700.00 | Window Closed / Lapsed |