Patent US3310688A successfully refreshed from Google Patents.
US3310688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical circuits
Assignee: RCA Corp
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Filing: 1964-05-07
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Granted: 1967-03-21
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Expires: 1984-05-07
Abstract
No abstract record available.
Inventors
- 👤 Ditkofsky Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:01
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/286; H03K3/2893; H03K3/2897; H03K5/00; H03K5/22; H03K5/24; H03K5/2409; H03K5/2418
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
78 words
THE COMBINATION COMPRISING: A PAIR OF TRANSISTORS EACH HAVING COLLECTOR, BASE AND EMITTER ELECTRODES; MEANS INCLUDING THE SERIES COMBINATION OF A RESISTANCE ELEMENT AND A SOURCE OF SUBSTANTIALLY CONSTANT CURRENT CONNECTED, BETWEEN THE EMITTER AND COLLECTOR ELECTRODES OF EACH OF SAID TRANSISTOR DEVICES; RESISTANCE MEANS CONNECTED BETWEEN THE BASE ELECTRODES OF THE PAIR OF TRANSISTORS; MEANS CONNECTING A POINT ON SAID RESISTANCE MEANS TO A POINT ON SAID SERIES COMBINATION BETWEEN THE RESISTANCE ELEMENT AND THE CURRENT SOURCE;
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-20 | 1970-09-19 | 1971-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-20 | 1974-09-19 | 1975-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-20 | 1978-09-19 | 1979-03-21 | $7700.00 | Window Closed / Lapsed |