US4910150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for determining coagulation parameter
Assignee: Roche Diagnostics GmbH
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Filing: 1988-09-19
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Granted: 1990-03-20
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Expires: 2008-09-19
Abstract
Abstract The present invention provides a test carrier for the determination of coagulation parameters, wherein it includes a test layer which contains glass fibres which are coated with polyvinyl alcohol or polyvinyl alcohol/vinyl acetate. The present invention also provides a process for the production of a glass fibre layer, wherein glass fibres are slurried in an excess of water with the addition of polyvinyl alcohol and a layer is formed according to a process conventional for the production of paper and dried at an elevated temperature. Furthermore, the present invention provides a process for the determination of coagulation parameters of blood, wherein it includes a process step in which blood is passed through a glass fibre layer which contains glass fibres which have been coated with polyvinyl alcohol or polyvinyl alcohol/vinyl acetate.
Inventors
- 👤 Jurgen Doeding
- 👤 Hans Wielinger
- 👤 Rolf Lerch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:33
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/52; D; D21; D21H; D21H13/00; D21H13/36; D21H13/38; D21H13/40; D21H5/00; D21H5/12; G01N33/86; Y; Y10; Y10T; Y10T436/00; Y10T436/25; Y10T436/25125; Y10T436/25375; Y10T436/255
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
72 words
Method for determining a coagulation parameter in a blood sample comprising adding a blood sample to a test layer so as to separate erythrocytes from plasma contained in the blood sample, wherein the test layer comprises silanized glass fibers which are coated with polyvinyl alcohol or polyvinyl alcohol/vinyl acetate, contacting the plasma obtained from the adding step with a reagent which permits determination of said coagulation parameter and determining said coagulation parameter.
Claim 2
Dependent Claim
72 words
Method for determining a coagulation parameter in a blood sample comprising adding a blood sample to a test layer so as to separate erythrocytes from plasma contained in the blood sample, wherein the test layer comprises silanized glass fibers which are coated with polyvinyl alcohol or polyvinyl alcohol/vinyl acetate, contacting the plasma obtained from the adding step with a reagent which permits determination of said coagulation parameter and determining said coagulation parameter.
Claim 3
Dependent Claim
14 words
Method of claim 1, wherein said layer contains from 0.5 to 20% polyvinyl alcohol.
Claim 4
Dependent Claim
14 words
Method of claim 1, wherein said layer contains from 1 to 5% polyvinyl alcohol.
Claim 5
Dependent Claim
10 words
Method of claim 1, wherein said layer is a fleece.
Claim 6
Dependent Claim
83 words
Method for determining a coagulation parameter in a blood sample comprising adding a blood sample to a test layer of a test carrier so as to separate erythrocytes from plasma contained in the blood sample, wherein the test layer comprises silanized glass fibers which are coated with polyvinyl alcohol or polyvinyl alcohol/vinyl acetate, contacting the plasma obtained from the adding step with a reagent which is on the test carrier and which permits determination of said coagulation parameter and determining said coagulation parameter.
Claim 7
Dependent Claim
83 words
Method for determining a coagulation parameter in a blood sample comprising adding a blood sample to a test layer of a test carrier so as to separate erythrocytes from plasma contained in the blood sample, wherein the test layer comprises silanized glass fibers which are coated with polyvinyl alcohol or polyvinyl alcohol/vinyl acetate, contacting the plasma obtained from the adding step with a reagent which is on the test carrier and which permits determination of said coagulation parameter and determining said coagulation parameter.
Claim 8
Dependent Claim
93 words
Method for determining a coagulation parameter in a blood sample comprising adding a blood sample to a test layer of a test carrier so as to separate erythrocytes from plasma contained in said sample, wherein the test layer is from 0.1 to 0.5 g/cm 3 in density and contains silanized glass fibers having an average diameter of from 0.2 to 5 μm, said silanized glass fibers being coated with polyvinyl alcohol or polyvinyl alcohol/vinyl acetate, contacting said plasma with a reagent which permits determination of said coagulation parameter and determining said coagulation parameter.
Claim 9
Dependent Claim
93 words
Method for determining a coagulation parameter in a blood sample comprising adding a blood sample to a test layer of a test carrier so as to separate erythrocytes from plasma contained in said sample, wherein the test layer is from 0.1 to 0.5 g/cm 3 in density and contains silanized glass fibers having an average diameter of from 0.2 to 5 μm, said silanized glass fibers being coated with polyvinyl alcohol or polyvinyl alcohol/vinyl acetate, contacting said plasma with a reagent which permits determination of said coagulation parameter and determining said coagulation parameter.
Claim 10
Dependent Claim
61 words
Method for determining a coagulation parameter of blood comprising contacting a plasma sample with a test layer, wherein the test layer comprises silanized glass fibers which are coated with polyvinyl alcohol or polyvinyl alcohol/vinyl acetate, contacting the plasma that has been contacted with the test layer with a reagent which permits determination of said coagulation parameter and determining said coagulation parameter.
Claim 11
Dependent Claim
61 words
Method for determining a coagulation parameter of blood comprising contacting a plasma sample with a test layer, wherein the test layer comprises silanized glass fibers which are coated with polyvinyl alcohol or polyvinyl alcohol/vinyl acetate, contacting the plasma that has been contacted with the test layer with a reagent which permits determination of said coagulation parameter and determining said coagulation parameter.
Claim 12
Dependent Claim
14 words
Method of claim 7, wherein said layer contains from 0.5 to 20% polyvinyl alcohol.
Claim 13
Dependent Claim
14 words
Method of claim 7, wherein said layer contains from 1 to 5% polyvinyl alcohol.
Claim 14
Dependent Claim
10 words
Method of claim 7, wherein said layer is a fleece.
Claim 15
Dependent Claim
68 words
Method for determining a coagulation parameter in a plasma containing sample comprising adding a plasma containing sample to a test layer of a test carrier, wherein the test layer comprises silanized glass fibers which are coated with polyvinyl alcohol or polyvinyl alcohol/vinyl acetate, said test layer affecting contact between the plasma containing sample and a reagent which permits determination of said coagulation parameter and determining said coagulation parameter.
Claim 16
Dependent Claim
68 words
Method for determining a coagulation parameter in a plasma containing sample comprising adding a plasma containing sample to a test layer of a test carrier, wherein the test layer comprises silanized glass fibers which are coated with polyvinyl alcohol or polyvinyl alcohol/vinyl acetate, said test layer affecting contact between the plasma containing sample and a reagent which permits determination of said coagulation parameter and determining said coagulation parameter.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-03-19 | 1993-09-18 | 1994-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-19 | 1997-09-18 | 1998-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-19 | 2001-09-18 | 2002-03-20 | $7700.00 | Window Closed / Lapsed |