Patent US2458930A successfully refreshed from Google Patents.
US2458930A
Expired / Lapsed
US
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Master safety switch
Assignee: Individual
•
Filing: 1947-04-17
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Granted: 1949-01-11
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Expires: 1967-04-17
Abstract
No abstract record available.
Inventors
- 👤 Crooke Fred Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:23
CPC Classifications
H; H01; H01H; H01H17/00; H01H1/00; H01H1/58; H01H2001/5877
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1839916A
Cited
US1615106A
Cited
GB386426A
Cited
US1995946A
Cited
US2104689A
Cited
US2277671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-11 | 1952-07-12 | 1953-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-11 | 1956-07-12 | 1957-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-11 | 1960-07-12 | 1961-01-11 | $7700.00 | Window Closed / Lapsed |