US3257587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Superconductive variable impedance element
Assignee: Raytheon Co
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Filing: 1963-12-30
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Granted: 1966-06-21
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Expires: 1983-12-30
Abstract
No abstract record available.
Inventors
- 👤 William R Krafft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:31
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/44; H; H01; H01F; H01F6/00; H01F6/006; H01F6/008; H03; H03J; H03J7/00; H03J7/02; H03J7/04; H03J7/14; H10; H10N; H10N60/00; Y; Y10; Y10S; Y10S336/00; Y10S336/01; Y10S505/00; Y10S505/825; Y10S505/881
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A VARIABLE IMPEDANCE ELEMENT FOR OPERATION AT CRYOGENIC TEMPERATURES, COMPRISING: A SUPERCONDUCTIVE MATERIAL EXHIBITING A SIGNIFICANT RESISTANCE VALUE AT A TEMPERATURE BELOW A CRITICAL TEMPERATURE ONLY IN THE PRESENCE OF A MAGNETIC FIELD IN EXCESS OF A CRITICAL VALUE; CRYOGENIC MEANS FOR MAINTAINING THE TEMPERATURE OF SAID MATERIAL BELOW SAID CRITICAL TEMPERATURE; AND MEANS FOR VARYING THE IMPEDANCE OF SAID ELEMENT, SAID MEANS COMPRISING MEANS FOR SELECTIVELY APPLYING TO PREDETERMINED REGIONS OF SAID MATERIAL A MAGNETIC FIELD HAVING A MAGNITUDE IN EXCESS OF SAID CRITICAL VALUE.
Claim 2
Dependent Claim
86 words
A VARIABLE IMPEDANCE ELEMENT FOR OPERATION AT CRYOGENIC TEMPERATURES, COMPRISING: A SUPERCONDUCTIVE MATERIAL EXHIBITING A SIGNIFICANT RESISTANCE VALUE AT A TEMPERATURE BELOW A CRITICAL TEMPERATURE ONLY IN THE PRESENCE OF A MAGNETIC FIELD IN EXCESS OF A CRITICAL VALUE; CRYOGENIC MEANS FOR MAINTAINING THE TEMPERATURE OF SAID MATERIAL BELOW SAID CRITICAL TEMPERATURE; AND MEANS FOR VARYING THE IMPEDANCE OF SAID ELEMENT, SAID MEANS COMPRISING MEANS FOR SELECTIVELY APPLYING TO PREDETERMINED REGIONS OF SAID MATERIAL A MAGNETIC FIELD HAVING A MAGNITUDE IN EXCESS OF SAID CRITICAL VALUE.
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) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |