Patent US2572294A successfully refreshed from Google Patents.
US2572294A
Expired / Lapsed
US
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Plunger type switch
Assignee: JOHN W HOBBS Corp
•
Filing: 1947-02-17
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Granted: 1951-10-23
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Expires: 1967-02-17
Abstract
No abstract record available.
Inventors
- 👤 Charles A Woodcock
- 👤 Sherman E Womack
- 👤 John W Hobbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:15
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/02; H01H13/12; H01H13/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US741905A
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US1114813A
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DE337508C
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US1699601A
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US2166803A
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US2224551A
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US2375891A
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US2413148A
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US2473252A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-22 | 1955-04-23 | 1955-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-22 | 1959-04-23 | 1959-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-22 | 1963-04-23 | 1963-10-23 | $7700.00 | Window Closed / Lapsed |