US4473552A
Expired / Lapsed
US
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Anaerobic method for preserving whole blood, tissue and components containing living mammalian cells
Assignee: Individual
•
Filing: 1982-08-02
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Granted: 1984-09-25
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Expires: 2002-08-02
Abstract
Abstract An anaerobic method for preserving mammalian blood, mammalian tissue or living-cell containing components of either in a state of suspended animation, and the products of that method, are described. The method involves adding the substance to be preserved to a receptacle containing anticoagulant and low molecular weight hydroxyethyl starch, hydroxypropyl starch or polystarch containing from about 450 to about 1000 glucose units per molecule, mixing well, while maintaining the temperature in the range of from about 35° to about 40° F., and storing the resulting mixture at the same temperature. In a preferred embodiment which preserves blood, tissue or a component indefinitely, the structure is lightly crosslinked (i.e., about 1 cross-link per 50 g glucose units) with the aid of a water-soluble cross-linking agent of the acrylamide type, to form a gel structure. When it is desired to use the preserved material, the swelled starch derivative may be liquefied, or the gel may be broken, by an isotonic wash or by microwaving. The bulk of the starch derivative and any acrylamide type crosslinker present are removed by filtration, whereupon the preserved material may be used in the same way as a freshly collected substance containing living cellular material might be used.
Inventors
- 👤 Leonora I. Jost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:18
CPC Classifications
A; A01; A01N; A01N1/00; A01N1/10; A01N1/12; A01N1/122; A01N1/126
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
87 words
A stable, nondeteriorating article of manufacture comprising a sealed receptacle containing (1) a gas inert to the other contents thereof and (2) a composition of matter comprising (a) a biological substance containing mammalian living cells in a state of suspension and (b) a low molecular weight starch derivative selected from the group consisting of hydroxyethyl starch, hydroxypropyl starch and polystarch containing from about 450 to about 1000 glucose units per molecule, which article is maintained at a temperature of from about 35° F. to about 40° F.
Claim 2
Dependent Claim
87 words
A stable, nondeteriorating article of manufacture comprising a sealed receptacle containing (1) a gas inert to the other contents thereof and (2) a composition of matter comprising (a) a biological substance containing mammalian living cells in a state of suspension and (b) a low molecular weight starch derivative selected from the group consisting of hydroxyethyl starch, hydroxypropyl starch and polystarch containing from about 450 to about 1000 glucose units per molecule, which article is maintained at a temperature of from about 35° F. to about 40° F.
Claim 3
Dependent Claim
23 words
An article of manufacture according to claim 1, wherein the biological substance comprises human whole blood and the starch derivative is hydroxyethyl starch.
Claim 4
Dependent Claim
27 words
An article of manufacture according to claim 1 wherein the biological substance comprises an erythrocyte fraction of mammalian whole blood and the starch derivative is hydroxyethyl starch.
Claim 5
Dependent Claim
27 words
An article of manufacture according to claim 1 wherein the biological substance comprises a leukocyte fraction of mammalian whole blood and the starch derivative is hydroxyethyl starch.
Claim 6
Dependent Claim
27 words
An article of manufacture according to claim 1 wherein the biological substance comprises a platelet fraction of mammalian whole blood and the starch derivative is hydroxyethyl starch.
Claim 7
Dependent Claim
27 words
An article of manufacture according to claim 1 wherein the biological substance comprises a plasma fraction of mammalian whole blood and the starch derivative is hydroxyethyl starch.
Claim 8
Dependent Claim
27 words
An article of manufacture according to claim 1 wherein the biological substance comprises an immunoglobulin fraction of mammalian whole blood and the starch derivative is hydroxyethyl starch.
Claim 9
Dependent Claim
27 words
An article of manufacture according to claim 1 wherein the biological substance comprises an antiserum fraction of mammalian whole blood and the starch derivative is hydroxyethyl starch.
Claim 10
Dependent Claim
28 words
An article of manufacture according to claim 1 wherein the biological substance comprises a purified component fraction of mammalian whole blood and the starch derivative is hydroxyethyl starch.
Claim 11
Dependent Claim
23 words
An article of manufacture according to claim 1 wherein the biological substance comprises particulate mammalian tissue and the starch derivative is hydroxyethyl starch.
Claim 12
Dependent Claim
27 words
An article of manufacture according to claim 1 wherein the biological substance comprises mammalian whole blood or a fraction thereof and the starch derivative is hydroxyethyl starch.
Claim 13
Dependent Claim
31 words
An article of manufacture according to claims 1, 2, 3, 4, 5, 6, 7, 8, 9 or 11 in which the composition of matter also contains an anticoagulant for mammalian blood.
Claim 14
Dependent Claim
33 words
An article of manufacture according to claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11 in which the composition of matter is swelled and gelled with a cross-linking agent.
Claim 15
Dependent Claim
26 words
An article of manufacture according to claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11 in which said gas is nitrogen gas.
Claim 16
Dependent Claim
70 words
An article of manufacture according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11 in which the composition of matter is swelled and gelled with a cross-linking agent and the cross-linking agent comprises a product formed by reacting tetramethylethylene diamine with acrylamide, bisacrylamide or hydroxylysine in the present of a water-soluble persulfate salt and allowing the mixture to stand for at least about sixty days.
Claim 17
Dependent Claim
76 words
An article of manufacture according to claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11 in which the composition of matter is swelled and gelled with a cross-linking agent and the cross-linking agent comprises a product formed by reacting tetramethylethylene diamine with hydroxylysine, acrylamide or bisacrylamide in the presence of a water-soluble persulfate salt and allowing the mixture to stand for at least about sixty days, and said gas is nitrogen gas.
Claim 18
Dependent Claim
23 words
An article of manufacture according to claim 15 in which the cross-linking agent comprises a product formed by reacting tetramethylethylene diamine with hydroxylysine.
Claim 19
Dependent Claim
23 words
An article of manufacture according to claim 16 in which the cross-linking agent comprises a product formed by reacting tetramethylethylene diamine with hydroxylysine.
Claim 20
Dependent Claim
22 words
An article of manufacture according to claim 12 in which the composition of matter is swelled and gelled with a cross-linking agent.
Claim 21
Dependent Claim
15 words
An article of manufacture according to claim 12 in which said gas is nitrogen gas.
Claim 22
Dependent Claim
135 words
A process for preserving a biological substance comprising living mammalian cells and rendering such composition storage stable at a temperature of from about 35° F. to about 40° F. which comprises the steps of, adding to a suitable storage receptacle a sterile aqueous solution comprising a swellable, low-molecular weight starch derivative containing from about 450 to about 1000 glucose units per molecule and selected from the group consisting of hydroxyethyl starch, hydroxypropyl starch and polystarch, adding to said sterile aqueous solution in said receptacle said biological substance comprising living mammalian cells, thoroughly mixing, purging said receptacle with a gas inert to the contents thereof while lowering the temperature to from about 35° F. to about 40° F., sealing the receptacle and storing it at a temperature of from about 35° F. to about 40° F.
Claim 23
Dependent Claim
135 words
A process for preserving a biological substance comprising living mammalian cells and rendering such composition storage stable at a temperature of from about 35° F. to about 40° F. which comprises the steps of, adding to a suitable storage receptacle a sterile aqueous solution comprising a swellable, low-molecular weight starch derivative containing from about 450 to about 1000 glucose units per molecule and selected from the group consisting of hydroxyethyl starch, hydroxypropyl starch and polystarch, adding to said sterile aqueous solution in said receptacle said biological substance comprising living mammalian cells, thoroughly mixing, purging said receptacle with a gas inert to the contents thereof while lowering the temperature to from about 35° F. to about 40° F., sealing the receptacle and storing it at a temperature of from about 35° F. to about 40° F.
Claim 24
Dependent Claim
20 words
The process of claim 21 wherein the biological substance comprises human whole blood and the starch derivative is hydroxyethyl starch.
Claim 25
Dependent Claim
24 words
The process of claim 21 wherein the biological substance comprises an erythrocyte fraction of human whole blood and the starch derivative is hydroxyethyl starch.
Claim 26
Dependent Claim
24 words
The process of claim 21 wherein the biological substance comprises a leukocyte fraction of human whole blood and the starch derivative is hydroxyethyl starch.
Claim 27
Dependent Claim
24 words
The process of claim 21 wherein the biological substance comprises a platelet fraction of human whole blood and the starch derivative is hydroxyethyl starch.
Claim 28
Dependent Claim
24 words
The process of claim 21 wherein the biological substance comprises a plasma fraction of human whole blood and the starch derivative is hydroxyethyl starch.
Claim 29
Dependent Claim
24 words
The process of claim 21 wherein the biological substance comprises an immunoglobulin fraction of human whole blood and the starch derivative is hydroxyethyl starch.
Claim 30
Dependent Claim
24 words
The process of claim 21 wherein the biological substance comprises an antiserum fraction of human whole blood and the starch derivative is hydroxyethyl starch.
Claim 31
Dependent Claim
24 words
The process of claim 21 wherein the biological substance comprises a purified component of human whole blood and the starch derivative is hydroxyethyl starch.
Claim 32
Dependent Claim
20 words
The process of claim 21 wherein the biological substance comprises particulate mammalian tissue and the starch derivative is hydroxyethyl starch.
Claim 33
Dependent Claim
24 words
The process of claim 21 wherein the biological substance comprises mammalian whole blood or a fraction thereof and the starch derivative is hydroxyethyl starch.
Claim 34
Dependent Claim
26 words
The process of claims 21, 22, 23, 24, 25, 26, 27, 29, 30 or 31 wherein the sterile aqueous solution also contains an anticoagulant for blood.
Claim 35
Dependent Claim
23 words
The process of claims 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 or 31 wherein the said gas is nitrogen gas.
Claim 36
Dependent Claim
31 words
The process of claims 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 or 31 wherein a cross-linking agent for said starch derivative is added after mixing and before purging.
Claim 37
Dependent Claim
68 words
The process of claims 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 or 31 wherein a cross-linking agent for said starch derivative is added after mixing and before purging and the cross-linking agent comprises a product formed by reacting tetramethylethylene diamine with hydroxylysine, acrylamide or bisacrylamide in the presence of a water-soluble persulfate salt and allowing the mixture to stand for at least about sixty days.
Claim 38
Dependent Claim
74 words
The process of claims 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 or 31 wherein a cross-linking agent for said starch derivative is added after mixing and before purging and the cross-linking agent comprises a product formed by reacting tetramethylethylene diamine with hydroxylysine, acrylamide or bisacrylamide in the presence of a water-soluble persulfate salt and allowing the mixture to stand for at least about sixty days, and said gas is nitrogen gas.
Claim 39
Dependent Claim
20 words
The process of claim 35 in which the cross-linking agent comprises a product formed by reacting tetramethylethylene diamine with hydroxylysine.
Claim 40
Dependent Claim
20 words
The process of claim 36 in which the cross-linking agent comprises a product formed by reacting tetramethylethylene diamine with hydroxylysine.
References Cited (Backward Citations)
No citation records indexed.
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 |