US3335337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Negative resistance semiconductor devices
Assignee: AURITSU ELECTRONIC WORKS Ltd
•
Filing: 1963-03-21
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Granted: 1967-08-08
•
Expires: 1983-03-21
Abstract
No abstract record available.
Inventors
- 👤 Kasugai Takahiko
- 👤 Nojima Susumu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:49
CPC Classifications
H; H10; H10P; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A NEGATIVE RESISTANCE SEMICONDUCTOR DEVICE OF THE JUNCTION TYPE COMPRISING A P+ TYPE SEMICONDUCTOR LAYER, AND N+ TYPE SEMICONDUCTOR LAYER AND AN INTERMEDIATE LAYER OF P OR N TYPE PROVIDED BETWEEN SAID SEMICONDUCTOR LAYERS, SAID INTERMEDIATE LAYER BEING DOPED WITH DEEP LEVEL IMPURITIES SUCH THAT THE CONCENTRATION OF SAID IMPURITIES GENERALLY DECREASE TOWARD THE CENTRAL PORTION OF SAID INTERMEDIATE LAYER FROM THE INTERFACE BETWEEN
Claim 2
Dependent Claim
64 words
A NEGATIVE RESISTANCE SEMICONDUCTOR DEVICE OF THE JUNCTION TYPE COMPRISING A P+ TYPE SEMICONDUCTOR LAYER, AND N+ TYPE SEMICONDUCTOR LAYER AND AN INTERMEDIATE LAYER OF P OR N TYPE PROVIDED BETWEEN SAID SEMICONDUCTOR LAYERS, SAID INTERMEDIATE LAYER BEING DOPED WITH DEEP LEVEL IMPURITIES SUCH THAT THE CONCENTRATION OF SAID IMPURITIES GENERALLY DECREASE TOWARD THE CENTRAL PORTION OF SAID INTERMEDIATE LAYER FROM THE INTERFACE BETWEEN
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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) | 1970-08-07 | 1971-02-06 | 1971-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-07 | 1975-02-06 | 1975-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-07 | 1979-02-06 | 1979-08-08 | $7700.00 | Window Closed / Lapsed |