US2709787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor signal translating device
Assignee: AT&T Inc
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Filing: 1953-09-24
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Granted: 1955-05-31
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Expires: 1973-09-24
Abstract
No abstract record available.
Inventors
- 👤 Reymond J Kircher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:20
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/36
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
98 words
A SIGNAL TRANSLATING DEVICE COMPRISING A BODY OF SEMICONDUCTIVE MATERIAL HAVING THEREIN A BASE ZONE OF ONE CONDUCTIVITY TYPE BETWEEN AND CONTIGUOUS WITH EMITTER AND COLLECTOR ZONES OF THE OPPOSITE CONDUCTIVITY TYPE, AN INPUT CIRCUIT CONNECTED BETWEEN SAID EMITTER AND BASE ZONES, AN OUTPUT CIRCUIT CONNECTED BETWEEN SAID BASE AND COLLECTOR ZONES, MEANS FOR ESTABLISHING A BIASING CURRENT THROUGH SAID BASE ZONE IN THE DIRECTION TRANSVERSE TO THE CARRIER PATH IN SAID BODY BETWEEN SAID EMITTER AND COLLECTOR ZONES, AND MEANS FOR CONTROLLING SAID BIASING CURRENT COMPRISING A CONNECTION TO SAID COLLECTOR ZONE, SAID CONNECTION HAVING RECTIFYING CHARACTERISTICS.
References Cited (Backward Citations)
US2657360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-30 | 1958-11-29 | 1959-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-30 | 1962-11-29 | 1963-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-30 | 1966-11-29 | 1967-05-31 | $7700.00 | Window Closed / Lapsed |