Patent US5417672A successfully refreshed from Google Patents.
US2982920A
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US
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Synchronising devices for use in electronic calculators
Assignee: Compagnie des Machines Bull SA
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Filing: 1957-02-19
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Granted: 1961-05-02
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Expires: 1977-02-19
Abstract
No abstract record available.
Inventors
- 👤 Feissel Henri Gerard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:17
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2495946A
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US2490500A
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US2797378A
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US2774872A
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US2817701A
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US2828478A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |