US2840494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of transistors
Assignee: Individual
•
Filing: 1952-12-31
•
Granted: 1958-06-24
•
Expires: 1972-12-31
Abstract
No abstract record available.
Inventors
- 👤 Henry W Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:58
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/20; H10P14/29; H10P14/2901; H10P14/2902; H10P14/2904; H10D; H10D99/00; H10P14/2905; H10P14/32; H10P14/3202; H10P14/3204; H10P14/3211; H10P14/34; H10P14/3402; H10P14/3404; H10P14/3411; H10P14/3438; H10P14/3441; H10P14/3442; H10P14/3444
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
AN NPN TRANSISTOR COMPRISING A TYPE N SEED CRYSTAL OF A METAL SELECTED FROM THE GROUP CONSISTING OF GERMANIUM AND SILICON, SUCCESSIVE SUPERPOSED THIN FILMS OF TYPE P OF THE SAME METAL INTEGRALLY UNITED WITH EACH OTHER AND WITH SAID SEED CRYSTAL IN THE SEME LATTICE FORMATION TO FORM A P-TYPE LAYER AND SUCCESSIVE SUPERPOSED THIN FILMS OF TYPE N OF THE SAME METAL INTEGRALLY UNITED WITH EACH OTHER AND WITH SAID P-TYPE LAYER IN THE SAME LATTICE FORMATION TO FORM AN N-TYPE LAYER SUPERPOSED ON SAID P-TYPE LAYER.
Claim 2
Dependent Claim
89 words
AN NPN TRANSISTOR COMPRISING A TYPE N SEED CRYSTAL OF A METAL SELECTED FROM THE GROUP CONSISTING OF GERMANIUM AND SILICON, SUCCESSIVE SUPERPOSED THIN FILMS OF TYPE P OF THE SAME METAL INTEGRALLY UNITED WITH EACH OTHER AND WITH SAID SEED CRYSTAL IN THE SEME LATTICE FORMATION TO FORM A P-TYPE LAYER AND SUCCESSIVE SUPERPOSED THIN FILMS OF TYPE N OF THE SAME METAL INTEGRALLY UNITED WITH EACH OTHER AND WITH SAID P-TYPE LAYER IN THE SAME LATTICE FORMATION TO FORM AN N-TYPE LAYER SUPERPOSED ON SAID P-TYPE LAYER.
References Cited (Backward Citations)
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Cited
US2153786A
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US2401443A
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US2410720A
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US2727840A
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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) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |