Patent US2829422A successfully refreshed from Google Patents.
US2829422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of fabricating semiconductor signal translating devices
Assignee: AT&T Inc
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Filing: 1952-05-21
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Granted: 1958-04-08
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Expires: 1972-05-21
Abstract
No abstract record available.
Inventors
- 👤 Calvin S Fuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:48
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/40; H10P14/46; H10P32/00; H10P32/10; H10P32/17; H10P32/171; H10P32/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
THE METHOD OF FABRICATNG A SEMICONDUCTIVE BODY FOR SIGNAL TRANSLATING DEVICES WHICH COMPRISES APPLYING A COATING OF GOLD TO ONE SURFACE OF A BODY OF N-TYPE GERMANIUM, PLACING A COPPER PARTICLE ON THE GOLD COATING, AND HEATING THE ASSEMBLY AT A TEMPERATURE BETWEEN ABOUT 600*C. AND 900*C. TO DIFFUSE COPPER INTO SAID BODY.
Claim 2
Independent Claim
53 words
THE METHOD OF FABRICATNG A SEMICONDUCTIVE BODY FOR SIGNAL TRANSLATING DEVICES WHICH COMPRISES APPLYING A COATING OF GOLD TO ONE SURFACE OF A BODY OF N-TYPE GERMANIUM, PLACING A COPPER PARTICLE ON THE GOLD COATING, AND HEATING THE ASSEMBLY AT A TEMPERATURE BETWEEN ABOUT 600*C. AND 900*C. TO DIFFUSE COPPER INTO 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) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |