US3865557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
AuIn{hd 2 {b as a cryogenic thermometer or refrigerant
Assignee: AT&T Inc
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Filing: 1973-11-09
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Granted: 1975-02-11
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Expires: 1993-11-09
Abstract
Abstract The metallic compound AuIn2 is useful as a thermometer or a refrigerant in the temperature region below 0.1*K. Its utility extends to the submillidegree Kelvin region. The thermometric parameter is its static nuclear magnetic susceptibility, which is relatively large. The refrigerating technique of adiabatic demagnetization is also applicable to the large nuclear magnetic moments of this material. The product of temperature and spinlattice relaxation time of AuIn2 is approximately constant in this temperature range and equal to 0.09 seconds-*K giving approximately 1 second relaxation time at 0.1*K and 1 minute at 1 millidegree K.
Inventors
- 👤 Klaus Andres
- 👤 Ernest Bucher
- 👤 Jack Harry Wernick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:48
CPC Classifications
F; F25; F25B; F25B21/00; C; C09; C09K; C09K5/00; C09K5/08; G; G01; G01K; G01K7/00; G01K7/36; G01K7/38; H; H10; H10N; H10N60/00; H10N60/80; H10N60/85; Y; Y02; Y02B; Y02B30/00; Y02P; Y02P20/00; Y02P20/10; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S505/00; Y10S505/825; Y10S505/842; Y10S505/847; Y10T; Y10T428/00; Y10T428/12; Y10T428/12431; Y10T428/12493; Y10T428/12681; Y10T428/12771; Y10T428/12861; Y10T428/12889
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
71 words
A DEVICE FOR USE AT TEMPERATURES BELOW 0.1*K COMPRISING A MASS OF AUIN2, WHEREIN THE AUIN2 CONTAINS LESS THAN A TOTAL OF 2 MOLAR PARTS PER MILLION OF MATTER POSSESSING A NET ELECTRONIC MAGNETIC MOMENT, AND WHEREIN THE AUIN2 CONTAINS LESS THAN 100 PARTS PER MILLION BY VOLUME OF SUPERCONDUCTOR MATTER AS A SECOND PHASE AND WHEREIN THE TOTAL CONTENT OF MATTER, OTHER THAN AUIN2, IS NO GREATER THAN 1 PERCENT.
Claim 2
Independent Claim
71 words
A DEVICE FOR USE AT TEMPERATURES BELOW 0.1*K COMPRISING A MASS OF AUIN2, WHEREIN THE AUIN2 CONTAINS LESS THAN A TOTAL OF 2 MOLAR PARTS PER MILLION OF MATTER POSSESSING A NET ELECTRONIC MAGNETIC MOMENT, AND WHEREIN THE AUIN2 CONTAINS LESS THAN 100 PARTS PER MILLION BY VOLUME OF SUPERCONDUCTOR MATTER AS A SECOND PHASE AND WHEREIN THE TOTAL CONTENT OF MATTER, OTHER THAN AUIN2, IS NO GREATER THAN 1 PERCENT.
Claim 3
Dependent Claim
26 words
A device of claim 1 in which the AuIn2 is in the form of at least one body, each body being affixed to a metallic body.
Claim 4
Dependent Claim
36 words
A device of claim 1, for use as a refrigerator in which at least a first portion of the AuIn2 is composed of at least one body possessing a least dimension no greater than 1 millimeter.
Claim 5
Dependent Claim
19 words
A device of claim 3 in which the AuIn2 is affixed to a body of metal different from AuIn2.
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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |