Patent US2550778A successfully refreshed from Google Patents.
US2550778A
Expired / Lapsed
US
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Electric timer
Assignee: Individual
•
Filing: 1947-05-13
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Granted: 1951-05-01
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Expires: 1967-05-13
Abstract
No abstract record available.
Inventors
- 👤 Arthur M Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:08
CPC Classifications
H; H01; H01H; H01H43/00; H01H43/30; H01H43/301; H01H43/302; H01H43/304
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1348746A
Cited
US1908676A
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US1974188A
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US2246724A
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US2237705A
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US2325551A
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US2422199A
Cited
US2362751A
Cited
US2362752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |