Patent US4239402A successfully refreshed from Google Patents.
Patent US3206618A successfully refreshed from Google Patents.
US3206618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Negative resistance devices
Assignee: Individual
•
Filing: 1963-03-15
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Granted: 1965-09-14
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Expires: 1983-03-15
Abstract
No abstract record available.
Inventors
- 👤 Heinz E Kallmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:05
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/83; H03K4/84; H03B; H03B7/00; H03B7/02; H03B7/06; H03K3/00; H03K3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A CURRENT CONTROLLED NEGATIVE RESISTANCE DEVICE COMPRISING, IN COMBINATION, AT LEAST TWO ELECTRODES OF CONDUCTIVE MATERIAL; AND A SEMICONDUCTOR BODY ARRANGED BETWEEN AND IN DIRECT CONTACT WITH SAID TWO ELECTRODES, THE MATERIAL OF SAID ELECTRODES AND SAID SEMICONDUCTOR BODY BEING SUCH AND SAID SEMICONDUCTOR BETWEEN SAID TWO ELECTRODES BEING SO THIN THAT THE ELECTRIC FIELD CAUSED BY THE CONTACT POTENTIAL BETWEEN AT LEAST ONE OF SAID ELECTRODES AND SAID SEMICONDUCTOR BODY PENETRATES AT LEAST
Claim 2
Dependent Claim
74 words
A CURRENT CONTROLLED NEGATIVE RESISTANCE DEVICE COMPRISING, IN COMBINATION, AT LEAST TWO ELECTRODES OF CONDUCTIVE MATERIAL; AND A SEMICONDUCTOR BODY ARRANGED BETWEEN AND IN DIRECT CONTACT WITH SAID TWO ELECTRODES, THE MATERIAL OF SAID ELECTRODES AND SAID SEMICONDUCTOR BODY BEING SUCH AND SAID SEMICONDUCTOR BETWEEN SAID TWO ELECTRODES BEING SO THIN THAT THE ELECTRIC FIELD CAUSED BY THE CONTACT POTENTIAL BETWEEN AT LEAST ONE OF SAID ELECTRODES AND SAID SEMICONDUCTOR BODY PENETRATES AT LEAST
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) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |