US2847544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon semiconductive devices
Assignee: General Electric Co
•
Filing: 1955-12-16
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Granted: 1958-08-12
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Expires: 1975-12-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Ernest A Taft
- 👤 Horn Fordyce Hubbard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:00
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; H; H10; H10N; H10N10/00; H10N10/80; H10N10/85; H10N10/851; H10N10/8556; H10P; H10P95/00; Y; Y10; Y10S; Y10S438/00; Y10S438/914; Y10S438/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A SEMICONDUCTOR CONTROL MEMBER COMPRISING A MONOCRYSTALLINE BODY OF SILICON HAVING THEREIN A NUMBER OF UNCOMPENSATED ACCEPTOR ACTIVATOR IMPURITIES NOT EXCEEDING 10**14 ATOMS THEREOF PER CU./CM. OF SILICON AND IMPREGNATED WITH FROM 10**14 TO 10**15 ATOMS PER CUBIC CENTI-
Claim 2
Dependent Claim
39 words
A SEMICONDUCTOR CONTROL MEMBER COMPRISING A MONOCRYSTALLINE BODY OF SILICON HAVING THEREIN A NUMBER OF UNCOMPENSATED ACCEPTOR ACTIVATOR IMPURITIES NOT EXCEEDING 10**14 ATOMS THEREOF PER CU./CM. OF SILICON AND IMPREGNATED WITH FROM 10**14 TO 10**15 ATOMS PER CUBIC CENTI-
References Cited (Backward Citations)
US2629672A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |