US3524029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keylock for electrical plugs
Assignee: ROBERT M LAFF
•
Filing: 1968-07-22
•
Granted: 1970-08-11
•
Expires: 1988-07-22
Abstract
No abstract record available.
Inventors
- 👤 Robert M Laff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:50
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/62; H01R13/639
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2733416A
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US1656586A
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US1588984A
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US2654073A
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US2643787A
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US2759159A
Cited
US2761028A
Cited
US2879494A
Cited
US2955272A
Cited
US3345603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |