Patent US4473739A successfully refreshed from Google Patents.
US4473739A
Expired / Lapsed
US
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Process and apparatus for warming of suspensions or solutions frozen in a flat plastic bag
Assignee: HELMHOLTZ-INSTITUT fur BIOMEDIZINISCHE TECHNIK GOETHESTR
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Filing: 1982-06-16
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Granted: 1984-09-25
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Expires: 2002-06-16
Abstract
Abstract There is provided an apparatus for warming aqueous suspensions or solutions of living cell substances contained in frozen form in a substantially flat plastic bag comprising two heater plates selectively movable against each other, which serve to receive the plastic bag containing the frozen sample, the temperature of these heater plates being programmable and the heater plates being supported by a holding device which is movable over a fixed base plate, this holding device being capable of being caused to swivel rhythmically in an elliptic direction by means of a swivelling device attached to it.
Inventors
- 👤 Max-Werner Scheiwe
- 👤 Gunter Rau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:08
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/1919; G05D23/192; A; A23; A23B; A23B2/00; A23B2/80; A23B2/82; A61; A61M; A61M5/00; A61M5/44; A61M5/445; B; B01; B01L; B01L7/00; A61M1/00; A61M1/02; A61M1/025; A61M2205/00; A61M2205/36; A61M2205/3653; A61M2205/366
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
100 words
Apparatus for the warming of aqueous suspensions or solutions of living cell substances contained in frozen form in a substantially flat plastic bag comprising two heater plates (2a,2b) selectively movable against each other, which serve to receive the said plastic bag (1) containing the said frozen sample, the temperature of the said heater plates being programmable and the said heater plates being supported by a holding device (14) which is movable over a fixed base plate (15) the said holding device being capable of being caused to swivel rhythmically in elliptic direction by means of a swivelling device attached thereto.
Claim 2
Dependent Claim
100 words
Apparatus for the warming of aqueous suspensions or solutions of living cell substances contained in frozen form in a substantially flat plastic bag comprising two heater plates (2a,2b) selectively movable against each other, which serve to receive the said plastic bag (1) containing the said frozen sample, the temperature of the said heater plates being programmable and the said heater plates being supported by a holding device (14) which is movable over a fixed base plate (15) the said holding device being capable of being caused to swivel rhythmically in elliptic direction by means of a swivelling device attached thereto.
Claim 3
Dependent Claim
39 words
Apparatus according to claim 1, further comprising measuring instruments (20, 21, 22) which, during the said warming process, monitor the surface temperature of both the said heater plates (2a, 2b) and the outside of the said plastic bag (1).
Claim 4
Dependent Claim
44 words
Apparatus according to claim 2, wherein said measuring instruments further comprise spring-mounted surface probes which extend through one of the said heater plates (2a) and press upon the said plastic bag (1) in order to monitor the surface temperature of the said plastic bag.
Claim 5
Dependent Claim
37 words
Apparatus according to claim 2, comprising mechanically operated spring-mounted probes pressing upon the said plastic bag (1) containing the said frozen sample capable of activating a signal as soon as the said frozen sample is completely thawed.
Claim 6
Dependent Claim
43 words
Apparatus according to claim 2, comprising means actuated by said measuring instruments, for causing the two heater plates to move apart and the frozen sample to be lifted off the lower heater plate (2b) as soon as the predetermined temperature has been reached.
Claim 7
Dependent Claim
46 words
Apparatus according to claim 2, wherein the said heater plates each comprise a thermally and electrically insulting plastic sheet (19) which is fixed to a heating conductor sheet (18) onto which first a thin electrically insulating sheet (17) and a second copper sheet (16) are fixed.
References Cited (Backward Citations)
US1986085A
Cited
US3030082A
Cited
US3399536A
Cited
US3475590A
Cited
US3480015A
Cited
US3590215A
Cited
US4117881A
Cited
US4309592A
Cited
US4146364A
Cited
US4356383A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-25 | 1988-03-26 | 1988-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-25 | 1992-03-26 | 1992-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-25 | 1996-03-26 | 1996-09-25 | $7700.00 | Window Closed / Lapsed |