US4716742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cryogenic system for radiation detectors
Assignee: S A T (SOCIETE ANONYME DE TELECOMMUNICATIONS) 41 RUE CANTAGREL 75631 PARIS CEDEX 13 (FRANCE)
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Filing: 1985-09-26
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Granted: 1988-01-05
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Expires: 2005-09-26
Abstract
Abstract A cryogenic device for radiation detectors is provided comprising an enclosure situated between a cryogenic cold finger supporting a detector and an external wall. After a brief degasification under vacuum of said enclosure, at least one gas is therein introduced, whose liquefaction or solidification temperature is higher than the temperature reached by said cold finger.
Inventors
- 👤 Michel M. E. Germain-Lacour
- 👤 Joseph M. A. Loiseau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:48
CPC Classifications
F; F25; F25D; F25D3/00; F17; F17C; F17C3/00; F17C3/02; F17C3/08; F17C3/085; F25D3/10; G; G01; G01J; G01J5/00; G01J5/02; G01J5/06; G01J5/061; F25D16/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
98 words
A cryogenic device for radiation detector comprising: a finger cooled to a low temperature and adapted for supporting and cooling said detector, a wall surrounding said finger having, opposite said detector, a window transparent to the radiation to be detected and in which the enclosure defined by said finger and said wall is closed and filled with at least a gas, said gas, as well as its pressure in the enclosure, being chosen so that said gas has a low thermal conductivity and so that its liquefaction or solidification temperature is higher than that reached by said finger.
Claim 2
Dependent Claim
98 words
A cryogenic device for radiation detector comprising: a finger cooled to a low temperature and adapted for supporting and cooling said detector, a wall surrounding said finger having, opposite said detector, a window transparent to the radiation to be detected and in which the enclosure defined by said finger and said wall is closed and filled with at least a gas, said gas, as well as its pressure in the enclosure, being chosen so that said gas has a low thermal conductivity and so that its liquefaction or solidification temperature is higher than that reached by said finger.
Claim 3
Dependent Claim
29 words
The device as claimed in claim 1, wherein said gas is chosen from the following: xenon, krypton, argon, nitrogen, carbon dioxide, nitrogen protoxide and a mixture of these gases.
Claim 4
Independent Claim
48 words
The device as claimed in any one of claims 1 and 2 including a cooling jacket surrounding said wall, and wherein a refrigerating fluid is used to a cool said finger and wherein said finger defines an outlet for the passage of refrigerating fluid to the cooling jacket.
References Cited (Backward Citations)
US3258602A
Cited
US3170306A
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US3306058A
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US3356846A
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FR1529857A
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US3593537A
Cited
US3970851A
Cited
US4487037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-04 | 1991-07-06 | 1992-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-04 | 1995-07-06 | 1996-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-04 | 1999-07-06 | 2000-01-05 | $7700.00 | Window Closed / Lapsed |