Patent US3174882A successfully refreshed from Google Patents.
US3174882A
Expired / Lapsed
US
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Tunnel diode
Assignee: AT&T Inc
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Filing: 1961-02-02
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Granted: 1965-03-23
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Expires: 1981-02-02
Abstract
No abstract record available.
Inventors
- 👤 Ralph A Logan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:41
CPC Classifications
H; H10; H10P; H10P34/00; H10P34/40; H10D; H10D99/00; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/023; Y10S438/00; Y10S438/979
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
THE PROCESS OF FABRICATING A TUNNEL DIODE WHOSE CURRENT-VOLTAGE CHARACTERISTIC EXHIBITS TWO NEGATIVE RESISTANCE REGIONS COMPRISING THE STEP OF INTRODUCING INTO THE P-TYPE ZONE OF A TUNNEL DIODE EXHIBITING ONE NEGATIVE RESISTANCE REGION A CONCENTRATION OF ACCEPTOR STATES OF RANDOM ENERGY AND TREATING SAID P-TYPE ZONE TO PRODUCE A SUFFICIENT CONCENTRATION OF ACCEPTOR STATES OF A PARTICULAR ENERGY TO PRODUCE A NEGATIVE RESISTANCE CHARACTERISTIC IN THE EXCESS CURRENT REGION.
Claim 2
Dependent Claim
69 words
THE PROCESS OF FABRICATING A TUNNEL DIODE WHOSE CURRENT-VOLTAGE CHARACTERISTIC EXHIBITS TWO NEGATIVE RESISTANCE REGIONS COMPRISING THE STEP OF INTRODUCING INTO THE P-TYPE ZONE OF A TUNNEL DIODE EXHIBITING ONE NEGATIVE RESISTANCE REGION A CONCENTRATION OF ACCEPTOR STATES OF RANDOM ENERGY AND TREATING SAID P-TYPE ZONE TO PRODUCE A SUFFICIENT CONCENTRATION OF ACCEPTOR STATES OF A PARTICULAR ENERGY TO PRODUCE A NEGATIVE RESISTANCE CHARACTERISTIC IN THE EXCESS CURRENT REGION.
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) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |