Patent US2921147A successfully refreshed from Google Patents.
US2921147A
Expired / Lapsed
US
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Enclosed double rotary switch
Assignee: General Electric Co
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Filing: 1957-09-03
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Granted: 1960-01-12
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Expires: 1977-09-03
Abstract
No abstract record available.
Inventors
- 👤 Hutt Philip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:34
CPC Classifications
H; H01; H01H; H01H19/00; H01H19/54; H01H19/56; H02; H02K; H02K17/00; H02K17/02; H02K17/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1305649A
Cited
US1718478A
Cited
US2020000A
Cited
US2035505A
Cited
FR893008A
Cited
US2659792A
Cited
US2723327A
Cited
US2634344A
Cited
GB720636A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |