US3284750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-temperature, negative-resistance element
Assignee: Hitachi Ltd
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Filing: 1964-03-25
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Granted: 1966-11-08
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Expires: 1984-03-25
Abstract
No abstract record available.
Inventors
- 👤 Komatsubara Kiichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:21
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/10; G; G11; G11C; G11C11/00; G11C11/21; G11C11/44; H01C7/00; H01C7/10; H10; H10P; H10P95/00; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/856; Y10S505/857; Y10S505/86
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
HIGH-SPEED ELECTROMECHANICAL ON-OFF SWITCHING DEVICE EXHIBITING NEGATIVE RESISTANCE CHARACTERISTICS COMPRISING A HIGHLY COMPENSATED SEMICONDUCTOR ELEMENT HAVING NEGATIVE RESISTANCE CHARACTERISTICS AND PROVIDED WITH TWO ELECTRODES TO IMPART CURRENT TO SAID ELEMENT, SAID TWO ELECTRODES BEING SEPARATED FROM EACH OTHER ON THE SURFACE OF SAID ELEMENT; MEANS TO MAINTAIN SAID ELEMENT IN AN EXTREMELY LOW TEMPERATURE STATE OF 77*K. AND LESS; AND MEANS FOR IMPARTING A MECHANICAL FORCE TO SAID ELEMENT IN ACCORDANCE WITH THE REQUIRED SWITCHING FUNCTION.
Claim 2
Dependent Claim
76 words
HIGH-SPEED ELECTROMECHANICAL ON-OFF SWITCHING DEVICE EXHIBITING NEGATIVE RESISTANCE CHARACTERISTICS COMPRISING A HIGHLY COMPENSATED SEMICONDUCTOR ELEMENT HAVING NEGATIVE RESISTANCE CHARACTERISTICS AND PROVIDED WITH TWO ELECTRODES TO IMPART CURRENT TO SAID ELEMENT, SAID TWO ELECTRODES BEING SEPARATED FROM EACH OTHER ON THE SURFACE OF SAID ELEMENT; MEANS TO MAINTAIN SAID ELEMENT IN AN EXTREMELY LOW TEMPERATURE STATE OF 77*K. AND LESS; AND MEANS FOR IMPARTING A MECHANICAL FORCE TO SAID ELEMENT IN ACCORDANCE WITH THE REQUIRED SWITCHING FUNCTION.
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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |