US3293450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfer circuit having wide range antilogarithm response
Assignee: Beckman Coulter Inc
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Filing: 1963-09-16
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Granted: 1966-12-20
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Expires: 1983-09-16
Abstract
No abstract record available.
Inventors
- 👤 James F Gibbons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:04
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
AN ANTILOG TRANSFER CIRCUIT COMPRISING: A TRANSISTOR HAVING AN EMITTER-BASE JUNCTION AND A COLLECTOR-BASE JUNCTON; MEANS FOR APPLYING TO SAID EMITTER-BASE JUNCTION A VOLTAGE SIGNAL THE ANTILOG OF WHICH IS DESIRED; AND MEANS FOR MAINTAINING SUBSTANTIALLY ZERO VOLTS ACROSS SAID COLLECTOR-BASE JUNCTION AND FOR DETECTING COLLECTOR CURRENT TO PROVIDE AN OUTPUT SIGNAL PROPORTIONAL TO THE ANTILOG OF SAID VOLTAGE SIGNAL.
Claim 2
Dependent Claim
60 words
AN ANTILOG TRANSFER CIRCUIT COMPRISING: A TRANSISTOR HAVING AN EMITTER-BASE JUNCTION AND A COLLECTOR-BASE JUNCTON; MEANS FOR APPLYING TO SAID EMITTER-BASE JUNCTION A VOLTAGE SIGNAL THE ANTILOG OF WHICH IS DESIRED; AND MEANS FOR MAINTAINING SUBSTANTIALLY ZERO VOLTS ACROSS SAID COLLECTOR-BASE JUNCTION AND FOR DETECTING COLLECTOR CURRENT TO PROVIDE AN OUTPUT SIGNAL PROPORTIONAL TO THE ANTILOG OF SAID VOLTAGE SIGNAL.
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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |