US3447121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical connectors particularly for electric resistance heating elements
Assignee: Edwin L Wiegand Co
•
Filing: 1966-11-07
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Granted: 1969-05-27
•
Expires: 1986-11-07
Abstract
No abstract record available.
Inventors
- 👤 George Edward Ammerman
- 👤 Donald M Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:30
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/02; H05B3/06; F; F24; F24C; F24C15/00; F24C15/10; F24C15/102; F24C15/104; H01; H01R; H01R13/00; H01R13/648; H01R13/652; H01R24/00; H01R24/20; H01R24/22; H01R13/40; H01R13/42; H01R13/428; H01R13/432; H01R2103/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1791264A
Cited
US1747896A
Cited
US2431366A
Cited
US2457703A
Cited
US2835780A
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US3145067A
Cited
US3184580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |