US4219334A
Expired / Lapsed
US
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Polymer carrier and method for carrying out scientific, analytical and diagnostic examinations
Assignee: Merck Patent GmbH
•
Filing: 1978-03-03
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Granted: 1980-08-26
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Expires: 1998-03-03
Abstract
Abstract A polymer carrier for scientific, analytical or diagnostic examinations. The carrier consists of a soluble polymer in which the materials to be examined and/or required for examinations are incorporated and which is fully dissolved for complete release of said materials.
Inventors
- 👤 Gert Schluter
- 👤 Wilhelm Schuster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:58
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/53; G01N33/543; G01N33/544; G01N33/545; G01N33/52; G01N33/521; Y; Y10; Y10S; Y10S436/00; Y10S436/903; Y10T; Y10T436/00; Y10T436/14; Y10T436/145555; Y10T436/146666
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
133 words
A process for preparing a product for scientific, analytical or diagnostic examination which comprises the steps: (a) admixing a material to be examined and/or a substance required for the examination with a solution comprised of a soluble carrier and a solvent for the carrier, and (b) evaporating off the solvent, the material and/or substance being uniformly dispersed in the soluble carrier, and said product being formed, said product comprising the material and/or substance and the soluble carrier, the soluble carrier consisting of a soluble polymer, the material to be examined and/or the substance required for the examination being uniformly dispersed and hermetically sealed without exposure to air in the soluble carrier being capable of fully dissolving in a solvent for the carrier, whereby there is a complete release of the material and/or substance.
Claim 2
Dependent Claim
133 words
A process for preparing a product for scientific, analytical or diagnostic examination which comprises the steps: (a) admixing a material to be examined and/or a substance required for the examination with a solution comprised of a soluble carrier and a solvent for the carrier, and (b) evaporating off the solvent, the material and/or substance being uniformly dispersed in the soluble carrier, and said product being formed, said product comprising the material and/or substance and the soluble carrier, the soluble carrier consisting of a soluble polymer, the material to be examined and/or the substance required for the examination being uniformly dispersed and hermetically sealed without exposure to air in the soluble carrier being capable of fully dissolving in a solvent for the carrier, whereby there is a complete release of the material and/or substance.
Claim 3
Dependent Claim
9 words
The product prepared by the process of claim 1.
Claim 4
Dependent Claim
17 words
A product as claimed in claim 2 wherein the soluble polymer is soluble in water and/or ethanol.
Claim 5
Dependent Claim
21 words
A product as claimed in claim 2 wherein the soluble polymer is selected from the group polyvinyl alcohol and polyvinyl pyrrolidone.
Claim 6
Dependent Claim
16 words
A product as claimed in claim 2 wherein the polymer is soluble in water and/or ethanol.
Claim 7
Dependent Claim
30 words
A product as claimed in claim 2 wherein the substance is a chemical or biological, reagent, a stain, an immunofluorescent reagent, an enzyme substrate/enzyme/immuno reagent mixture and/or a buffer salt.
Claim 8
Dependent Claim
14 words
A product as claimed in claim 6 wherein the material is microorganisms or cells.
Claim 9
Dependent Claim
19 words
A product as claimed in claim 7 wherein the carrier is in the form of a film or foil.
Claim 10
Dependent Claim
20 words
A product as claimed in claim 8 wherein the carrier is in the form of at least two sandwiched layers.
Claim 11
Dependent Claim
12 words
A product as claimed in claim 9 wherein the material is cells.
Claim 12
Dependent Claim
35 words
A product as claimed in claim 2 wherein the substance is a chemical or biological reagent, a stain, an immunofluorescent reagent, an enzyme substrate, an enzyme, an enzyme substrate/enzyme/immuno reagent mixture and/or a buffer salt.
Claim 13
Dependent Claim
14 words
A product as claimed in claim 2 wherein the material is microorganisms or cells.
Claim 14
Dependent Claim
19 words
A product as claimed in claim 2 wherein the carrier is in the form of a film or foil.
Claim 15
Dependent Claim
20 words
A product as claimed in claim 2 wherein the carrier is in the form of at least two sandwiched layers.
Claim 16
Dependent Claim
12 words
A product as claimed in claim 14 wherein the material is cells.
Claim 17
Dependent Claim
15 words
A product as claimed in claim 2 wherein the evaporation is achieved at room temperature.
Claim 18
Dependent Claim
17 words
A as claimed in claim 2 where the solvent used in step (a) is water and/or ethanol.
Claim 19
Dependent Claim
60 words
A method for scientific, analytical or diagnostic examinations which comprises contacting the product of claim 2 with a solvent, whereby the polymer carrier in such product is dissolved in such solvent fully releasing the homogeneously dispersed material and/or substance into such solvent immediately before examination, a solution being formed, and using such solution for a scientific analytical or diagnostic examination.
Claim 20
Dependent Claim
16 words
A method as claimed in claim 18 wherein the carrier is dissolved in water and/or ethanol.
Claim 21
Dependent Claim
62 words
A method as claimed in claim 18 wherein the polymer carrier is soluble in the body fluids to be examined and the substance required for the examination are reactive with the body fluids and are incorporated in the carrier in accurately dosed quantities, and the carrier is dissolved in a suitable amount of sample body fluid and the reaction products are determined.
Claim 22
Dependent Claim
62 words
A method as claimed in claim 18, wherein the substance required for the examination has been incorporated into the soluble polymer carrier, the product is wetted on one side with a suitable solvent, the wetted side of the product is brought into contact with a material to be examined, and the product is subsequently fully dissolved in a solvent immediately before examination.
Claim 23
Dependent Claim
19 words
A method as claimed in claim 21 wherein the side of the product is wetted with water and/or ethanol.
Claim 24
Dependent Claim
18 words
A method as claimd in claim 21 wherein the product is subsequently fully dissolved in water and/or ethanol.
References Cited (Backward Citations)
US3963442A
Cited
US4038485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-26 | 1984-02-25 | 1984-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-26 | 1988-02-25 | 1988-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-26 | 1992-02-25 | 1992-08-26 | $7700.00 | Window Closed / Lapsed |