Patent US3070709A successfully refreshed from Google Patents.
US3070709A
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US
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Inverter circuit and complementing flip-flop using constant current sources and isolated collector to emitter connections
Assignee: International Business Machines Corp
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Filing: 1958-05-22
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Granted: 1962-12-25
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Expires: 1978-05-22
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Slobodzinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:21
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/01; H03K3/012; H03K19/00; H03K19/02; H03K19/08; H03K19/082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |