US3356945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for testing a transistor and selecting and identifying the unknown leads thereof
Assignee: American Electronic Laboratories Inc
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Filing: 1962-04-17
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Granted: 1967-12-05
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Expires: 1982-04-17
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Ryan
- 👤 Irvine P Stapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:13
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/26; G01R31/2607
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
THE METHOD FOR SELECTING THE BASE LEAD OF AN OPERATIVE TRANSISTOR WITH UNKNOWN LEADS WHICH COMPRISES: (A) CONNECTING TOGETHER A SELECTED TWO OF THE TRHEE LEADS OF A TRANSISTOR AND APPLYING TO THE COMBINATION VOLTAGE OF PREDETERMINED SENSE BETWEEN THE CONNECTED AND UNCONNECTED LEADS OF SAID TRANSISTOR, (B) DETERMINED WHETHER AS A RESULT THERE IS A CURRENT THROUGH THE TRANSISTOR BETWEEN THE LEADS TO WHICH SAID VOLTAGE IS APPLIED, (C) PERFORMING THE STEPS (A) AND (B) FOR THE CONNECTIONS OF THE PAIRS OF LEADS OF THE TRANSISTOR FOR THE REMAINING TWO COMBINATIONS OF SAID LEADS AFTER DISCONNECTING THE PREVIOUSLY CONNECTED LEADS WITH SAID VOLTAGE APPLIED IN THE SAME SAID PREDETERMINED SENSE BETWEEN THE CONNECTED AND UNCONNECTED LEADS OF SAID TRANSISTOR, (D) AND DESIGNATING AS THE BASE LEAD OF SAID TRANSISTOR THE UNCONNECTED LEAD OF THE COMBINATION OF LEADS WHICH HAS A RESULT IN STEP (B) SUBSTANTIALLY DIFFERENT FROM THE RESULTS OF THE REMAINGING TWO COMBINATIONS OF SAID LEADS.
Claim 2
Independent Claim
158 words
THE METHOD FOR SELECTING THE BASE LEAD OF AN OPERATIVE TRANSISTOR WITH UNKNOWN LEADS WHICH COMPRISES: (A) CONNECTING TOGETHER A SELECTED TWO OF THE TRHEE LEADS OF A TRANSISTOR AND APPLYING TO THE COMBINATION VOLTAGE OF PREDETERMINED SENSE BETWEEN THE CONNECTED AND UNCONNECTED LEADS OF SAID TRANSISTOR, (B) DETERMINED WHETHER AS A RESULT THERE IS A CURRENT THROUGH THE TRANSISTOR BETWEEN THE LEADS TO WHICH SAID VOLTAGE IS APPLIED, (C) PERFORMING THE STEPS (A) AND (B) FOR THE CONNECTIONS OF THE PAIRS OF LEADS OF THE TRANSISTOR FOR THE REMAINING TWO COMBINATIONS OF SAID LEADS AFTER DISCONNECTING THE PREVIOUSLY CONNECTED LEADS WITH SAID VOLTAGE APPLIED IN THE SAME SAID PREDETERMINED SENSE BETWEEN THE CONNECTED AND UNCONNECTED LEADS OF SAID TRANSISTOR, (D) AND DESIGNATING AS THE BASE LEAD OF SAID TRANSISTOR THE UNCONNECTED LEAD OF THE COMBINATION OF LEADS WHICH HAS A RESULT IN STEP (B) SUBSTANTIALLY DIFFERENT FROM THE RESULTS OF THE REMAINGING TWO COMBINATIONS OF SAID LEADS.
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) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |