Patent US4712607A successfully refreshed from Google Patents.
US4712607A
Expired / Lapsed
US
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Cryosystem for biological material
Assignee: Freeze Control Pty Ltd
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Filing: 1985-11-08
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Granted: 1987-12-15
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Expires: 2005-11-08
Abstract
Abstract A cryo-cell assembly for biological material including a space for receiving the material, the space being at least partly enclosed by means suitable for conducting heat from the space to a heat sink and including heat generating means in heat conducting relationship with the space. Power is applied to the heat generating means according to a desired temperature cycle stored in memory. The power supply unit senses actual temperature in said space and compares this with the desired temperature. Power is supplied to the heat generating means whenever the actual temperature falls below the desired temperature.
Inventors
- 👤 Willem Lindemans
- 👤 Lauri J. Aaltonen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:56
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/28; G01N1/42; A; A01; A01N; A01N1/00; A01N1/10; A01N1/14; A01N1/142; F; F25; F25D; F25D25/00; F25D25/005; F25D3/00; F25D3/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
79 words
A cyro-cell assembly for freezing/thawing biological material, said assembly including a core member having a substantially circular cross-section, a plurality of spaces formed in said core member for receiving said biological material, said core member being adapted for conducting heat from said spaces to a cryogenic heat sink, said assembly including heat generating means in heat conducting relationship with said spaces and said spaces being arranged such that they intercept common isotherms which lie substantially along concentric cylindrical surfaces.
Claim 2
Dependent Claim
79 words
A cyro-cell assembly for freezing/thawing biological material, said assembly including a core member having a substantially circular cross-section, a plurality of spaces formed in said core member for receiving said biological material, said core member being adapted for conducting heat from said spaces to a cryogenic heat sink, said assembly including heat generating means in heat conducting relationship with said spaces and said spaces being arranged such that they intercept common isotherms which lie substantially along concentric cylindrical surfaces.
Claim 3
Dependent Claim
12 words
A cryo-cell assembly according to claim 1 including an under/over temperature alarm.
Claim 4
Dependent Claim
28 words
A cryo-cell assembly according to claim 1 including an outer member spaced from said core member and an insulating layer intermediate said core member and said outer member.
Claim 5
Dependent Claim
17 words
A cryo-cell assembly according to claim 3 wherein said core member and said outer member are tubular.
Claim 6
Dependent Claim
27 words
A cryo-cell assembly according to claim 4 wherein said spaces comprise slots formed longitudinally in said core member suitable for receiving straws bearing specimens of biological material.
Claim 7
Dependent Claim
20 words
A cryo-cell assembly according to claim 5 wherein said slots are formed around a perimeter of the tubular core member.
Claim 8
Dependent Claim
15 words
A cryo-cell assembly according to claim 1 wherein said core member comprises high purity aluminum.
Claim 9
Dependent Claim
16 words
A cryo-cell assembly according to claim 1 wherein said heat generating means comprises a heater element.
Claim 10
Dependent Claim
21 words
A cryo-cell assembly according to claim 1 wherein said heat generating means comprises a heater element wound around said core member.
Claim 11
Dependent Claim
31 words
A cryo-cell assembly according to claim 1 wherein said heat generating means includes a supply unit for supplying power to said heat generating means in accordance with a desired temperature cycle.
Claim 12
Dependent Claim
36 words
A cryo-cell assembly according to claim 10 wherein the supply of electrical power to said heat generating element is pulse-width modulated and the width of the pulses is controlled by the output of the comparator means.
Claim 13
Dependent Claim
93 words
A cryo-cell assembly for biological material according to claim 1 further comprising: a supply unit for supplying electrical power to said heat generating means in accordance with a desired temperature cycle, said supply unit including actual temperature sensing means for sensing actual temperature associated with said spaces; memory means for storing the desired temperature cycle; comparator means for comparing the desired temperature and the actual temperature; and heat control means responsive to the comparator means for supplying electrical power to said heat generating element whenever the actual temperature falls below the desired temperature.
Claim 14
Dependent Claim
21 words
A cryo-cell assembly according to claim 12 wherein said means for sensing actual temperature is located in one of said spaces.
Claim 15
Dependent Claim
29 words
A cryo-cell assembly according to claim 12 wherein said memory means comprises a read only memory and said desired temperature cycle is stored in said memory in digital form.
Claim 16
Dependent Claim
28 words
A cyro-cell assembly according to claim 14 further including digital-to-analogue conversion means for converting the stored temperature cycle to analogue form prior to comparison with the actual temperature.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-14 | 1991-06-15 | 1991-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-14 | 1995-06-15 | 1995-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-14 | 1999-06-15 | 1999-12-15 | $7700.00 | Window Closed / Lapsed |