US2822307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Technique for multiple p-n junctions
Assignee: GTE Sylvania Inc
•
Filing: 1953-04-24
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Granted: 1958-02-04
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Expires: 1973-04-24
Abstract
No abstract record available.
Inventors
- 👤 Kopelman Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:59
CPC Classifications
H; H10; H10P; H10P10/00; H10P10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
IN THE METHOD OF FABRICATING JUNCTION TYPE TRANSISTORS THE STEPS COMPRISING ASEMBLING SLICES OF SEMI-CONDUCTOR MATERIALS OF OPPOSITE CONDUCTIVITY TYPES AND DIFFERENT MELTING POINTS IN ALTERNATE LAYERS TO FORM A STACK, HEATING SAID STACK TO A TEMPERATURE LYING BETWEEN THE MELTING POINTS OF SAID SEMI-CONDUCTOR MATERIALS, HOLDING THE STACK AT THIS TEMPERATURE UNTIL EQUILIBRIUM IS REACHED AND ALLOWING THE HEATED STACK TO COOL.
Claim 2
Dependent Claim
63 words
IN THE METHOD OF FABRICATING JUNCTION TYPE TRANSISTORS THE STEPS COMPRISING ASEMBLING SLICES OF SEMI-CONDUCTOR MATERIALS OF OPPOSITE CONDUCTIVITY TYPES AND DIFFERENT MELTING POINTS IN ALTERNATE LAYERS TO FORM A STACK, HEATING SAID STACK TO A TEMPERATURE LYING BETWEEN THE MELTING POINTS OF SAID SEMI-CONDUCTOR MATERIALS, HOLDING THE STACK AT THIS TEMPERATURE UNTIL EQUILIBRIUM IS REACHED AND ALLOWING THE HEATED STACK TO COOL.
References Cited (Backward Citations)
GB375304A
Cited
US2555001A
Cited
US2569347A
Cited
US2629672A
Cited
US2701326A
Cited
US2561411A
Cited
US2708646A
Cited
US2721965A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |