Patent US2561187A successfully refreshed from Google Patents.
US2561187A
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Program-timing mechanism
Assignee: Motorola Solutions Inc
•
Filing: 1945-04-25
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Granted: 1951-07-17
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Expires: 1965-04-25
Abstract
No abstract record available.
Inventors
- 👤 Harold F Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:31
CPC Classifications
H; H01; H01H; H01H43/00; H01H43/10; H01H43/12; H01H43/125; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86445
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB271995A
Cited
US1963495A
Cited
US2106042A
Cited
US2225407A
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US2161604A
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US2168068A
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US2094925A
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US2241610A
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US2376901A
Cited
US2391718A
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US2425788A
Cited
US2374590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-16 | 1955-01-15 | 1955-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-16 | 1959-01-15 | 1959-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-16 | 1963-01-15 | 1963-07-17 | $7700.00 | Window Closed / Lapsed |