Patent US2979429A successfully refreshed from Google Patents.
US2979429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffused transistor and method of making
Assignee: Texas Instruments Inc
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Filing: 1958-07-09
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Granted: 1961-04-11
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Expires: 1978-07-09
Abstract
No abstract record available.
Inventors
- 👤 Cornelison Boyd
- 👤 Jr Elmer A Wolff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:20
CPC Classifications
H; H10; H10P; H10P95/00; H10P95/50; C; C30; C30B; C30B31/00; C30B31/06; H10D; H10D62/00; H10D62/80; H10D62/83; H10D62/834; H10P32/00; H10P32/10; H10P32/12; H10P32/17; H10P32/171; Y; Y10; Y10S; Y10S438/00; Y10S438/914; Y10S438/919
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE METHOD OF FABRICATING A SEMICONDUCTIVE BODY HAVING A PLURALITY OF LAYERS OF DIFFERENT CONDUCTIVITIES AND AT LEAST ONE LAYER OF INTRINSIC CONDUCTIVITY COMPRISING PLACING A BODY OF SEMICONDUCTIVE MATERIAL OF AN NTYPE CONDUCTIVITY IN A CHAMBER EVACUATING AIR FROM THE CHAMBER, SUBJECTING THE BODY SIMULTANEOUSLY TO THE VAPOR OF THE ELEMENTS GALLIUM, INDIUM AND ARSENIC AT A TEMPERATURE AND FOR A TIME SUFFICIENT TO PRODUCE DIFFUSION OF SAID ELEMENTS INTO SAID BODY.
Claim 2
Independent Claim
73 words
THE METHOD OF FABRICATING A SEMICONDUCTIVE BODY HAVING A PLURALITY OF LAYERS OF DIFFERENT CONDUCTIVITIES AND AT LEAST ONE LAYER OF INTRINSIC CONDUCTIVITY COMPRISING PLACING A BODY OF SEMICONDUCTIVE MATERIAL OF AN NTYPE CONDUCTIVITY IN A CHAMBER EVACUATING AIR FROM THE CHAMBER, SUBJECTING THE BODY SIMULTANEOUSLY TO THE VAPOR OF THE ELEMENTS GALLIUM, INDIUM AND ARSENIC AT A TEMPERATURE AND FOR A TIME SUFFICIENT TO PRODUCE DIFFUSION OF SAID ELEMENTS INTO SAID BODY.
References Cited (Backward Citations)
US2861018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |