US2856320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making transistor with welded collector
Assignee: International Business Machines Corp
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Filing: 1955-09-08
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Granted: 1958-10-14
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Expires: 1975-09-08
Abstract
No abstract record available.
Inventors
- 👤 Robert E Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:30
CPC Classifications
H; H10; H10P; H10P95/00; F; F24; F24D; F24D3/00; F24D3/02; H10D; H10D99/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
THE METHOD OF MAKING A TRANSISTOR BODY HAVING AN AMPLIFYING COLLECTOR WELDED THERETO COMPRISING PLACING A BODY OF SEMI-CONDUCTIVE MATERIAL HAVING EXTRINSIC CONDUCTIVITY OF A PREDETERMINED TYPE IN CONTACT WITH A WIRE OF METAL WHICH WILL ALLOY WITH THE SEMI-CONDUCTIVE MATERIAL AND CONTAINING IMPURITIES WHICH, WHEN ALLOYED INTO SAID MATERIAL, PRODUCE CONDUCTIVITY OF SAID PREDETERMINED TYPE, CHARGING A CAPCITOR HAVING A CAPACITANCE IN THE RANGE FROM 0.02 MFD. TO 1.0 MFD., TO A POTENTIAL BETWEEN 300 AND 700 VOLTS, AND DISCHARGING SAID CAPACITOR THROUGH THE AREA OF CONTACT BETWEEN SAID WIRE AND SAID BODY.
Claim 2
Independent Claim
94 words
THE METHOD OF MAKING A TRANSISTOR BODY HAVING AN AMPLIFYING COLLECTOR WELDED THERETO COMPRISING PLACING A BODY OF SEMI-CONDUCTIVE MATERIAL HAVING EXTRINSIC CONDUCTIVITY OF A PREDETERMINED TYPE IN CONTACT WITH A WIRE OF METAL WHICH WILL ALLOY WITH THE SEMI-CONDUCTIVE MATERIAL AND CONTAINING IMPURITIES WHICH, WHEN ALLOYED INTO SAID MATERIAL, PRODUCE CONDUCTIVITY OF SAID PREDETERMINED TYPE, CHARGING A CAPCITOR HAVING A CAPACITANCE IN THE RANGE FROM 0.02 MFD. TO 1.0 MFD., TO A POTENTIAL BETWEEN 300 AND 700 VOLTS, AND DISCHARGING SAID CAPACITOR THROUGH THE AREA OF CONTACT BETWEEN SAID WIRE AND SAID BODY.
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) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |