US2736849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Junction-type transistors
Assignee: Hazeltine Research Inc
•
Filing: 1952-12-23
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Granted: 1956-02-28
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Expires: 1972-12-23
Abstract
No abstract record available.
Inventors
- 👤 Ronald W Douglas
- 👤 John W Ryde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:28
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/10; H10D10/00; H10D99/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A JUNCTION-TYPE TRANSISTOR COMPRISING: A BODY OF SEMICONDUCTIVE MATERIAL INCLUDING TWO MEMBERS, ONE THEREOF HAVING AN ELECTRICAL CONDUCTIVITY OF ONE TYPE IN ONE ZONE THEREOF AND AN ELECTRICAL CONDUCTIVITY OF ANOTHER TYPE IN ANOTHER ZONE THEREOF AND HAVING A PREDETERMINED SURFACE, AND THE OTHER MEMBER HAVING AN ELECTRICAL CONDUCTIVITY OF SAID ONE TYPE AND A SURFACE HAVING AN AREA LESS THAN OF SAID PREDETERMINED SURFACE, SAID SURFACE OF SAID OTHER MEMBER BEING HEAT AND PRESURE BONDED TO SAID SURFACE OF SAID ONE MEMBER SO THAT THE INTERFACE OF SAID SURFACES HAS AN AREA LESS THAN THAT OF SAID PREDETERMINED SURFACE; AND MEANS FOR MAKING AN ELECTRICAL CONNECTION TO EACH OF SAID MEMBERS AND FOR MAKING AN ELECTRICAL CONNECTION TO SAID PREDETERMINED SURFACE.
Claim 2
Dependent Claim
122 words
A JUNCTION-TYPE TRANSISTOR COMPRISING: A BODY OF SEMICONDUCTIVE MATERIAL INCLUDING TWO MEMBERS, ONE THEREOF HAVING AN ELECTRICAL CONDUCTIVITY OF ONE TYPE IN ONE ZONE THEREOF AND AN ELECTRICAL CONDUCTIVITY OF ANOTHER TYPE IN ANOTHER ZONE THEREOF AND HAVING A PREDETERMINED SURFACE, AND THE OTHER MEMBER HAVING AN ELECTRICAL CONDUCTIVITY OF SAID ONE TYPE AND A SURFACE HAVING AN AREA LESS THAN OF SAID PREDETERMINED SURFACE, SAID SURFACE OF SAID OTHER MEMBER BEING HEAT AND PRESURE BONDED TO SAID SURFACE OF SAID ONE MEMBER SO THAT THE INTERFACE OF SAID SURFACES HAS AN AREA LESS THAN THAT OF SAID PREDETERMINED SURFACE; AND MEANS FOR MAKING AN ELECTRICAL CONNECTION TO EACH OF SAID MEMBERS AND FOR MAKING AN ELECTRICAL CONNECTION TO SAID PREDETERMINED SURFACE.
References Cited (Backward Citations)
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Cited
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US2701326A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |