Patent US2680368A successfully refreshed from Google Patents.
US2680368A
Expired / Lapsed
US
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Safety lock for switches
Assignee: Briggs Manufacturing Co
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Filing: 1951-08-07
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Granted: 1954-06-08
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Expires: 1971-08-07
Abstract
No abstract record available.
Inventors
- 👤 Edward R Mckitrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:51
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/20; H01H9/28; H01H9/285; Y; Y10; Y10S; Y10S70/00; Y10S70/30; Y10T; Y10T70/00; Y10T70/40; Y10T70/50; Y10T70/5611; Y10T70/70; Y10T70/7441; Y10T70/7486; Y10T70/7508; Y10T70/7559; Y10T70/7661
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |