US2663768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety locking device for manually operated circuit breakers
Assignee: Individual
•
Filing: 1952-01-09
•
Granted: 1953-12-22
•
Expires: 1972-01-09
Abstract
No abstract record available.
Inventors
- 👤 Carl P Sorensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:58
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/20; H01H9/28; H01H9/281; H01H9/282; H01H9/283; Y; Y10; Y10S; Y10S70/00; Y10S70/57; Y10T; Y10T70/00; Y10T70/50; Y10T70/5611; Y10T70/5642; Y10T70/569; Y10T70/573; Y10T70/5735; Y10T70/5739; Y10T70/5757; Y10T70/5765; Y10T70/577; Y10T70/5774; Y10T70/5779
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2192060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |