US3543218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety connectors for electrical extension cords
Assignee: SEAMAN S UNIT
•
Filing: 1968-03-08
•
Granted: 1970-11-24
•
Expires: 1988-03-08
Abstract
No abstract record available.
Inventors
- 👤 Andrew M Archer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:12
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/02; H01R13/20; Y; Y10; Y10S; Y10S439/00; Y10S439/915; Y10S439/923
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1341468A
Cited
US1941374A
Cited
US2002558A
Cited
US2115010A
Cited
US2274798A
Cited
US2610266A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-23 | 1974-05-25 | 1974-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-23 | 1978-05-25 | 1978-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-23 | 1982-05-25 | 1982-11-24 | $7700.00 | Window Closed / Lapsed |