US4391906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for the determination of glucose in fluids
Assignee: Bayer Corp
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Filing: 1982-03-15
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Granted: 1983-07-05
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Expires: 2002-03-15
Abstract
Abstract The present invention involves an improved test system for the determination of glucose in aqueous fluids of the type which comprises glucose oxidase, a peroxidatively active substance and chromogen. The improvement involves the use of m-anisidine as a chromogen which permits the semi-quantitative determination of glucose at higher concentrations than is possible with previously used chromogens.
Inventors
- 👤 Robert Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:29
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/54; Y; Y10; Y10S; Y10S435/00; Y10S435/805; Y10S435/81; Y10T; Y10T436/00; Y10T436/14; Y10T436/142222; Y10T436/143333; Y10T436/144444
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
91 words
A test capable of the determination of the presence of glucose in a liquid test sample which device comprises a carrier matrix which bears the residue left by impregnating it with a liquid reagent solution of solvent, glucose oxidase, a peroxidatively active substance and m-anisidine with subsequent evaporation of the solvent to leave the dry reagent composition wherein the reagent components are present in the carrier matrix in amounts and proportions such that the carrier matrix is capable of differentiating between concentrations of 2,000 and 5,000 milligrams of glucose per deciliter.
Claim 2
Dependent Claim
91 words
A test capable of the determination of the presence of glucose in a liquid test sample which device comprises a carrier matrix which bears the residue left by impregnating it with a liquid reagent solution of solvent, glucose oxidase, a peroxidatively active substance and m-anisidine with subsequent evaporation of the solvent to leave the dry reagent composition wherein the reagent components are present in the carrier matrix in amounts and proportions such that the carrier matrix is capable of differentiating between concentrations of 2,000 and 5,000 milligrams of glucose per deciliter.
Claim 3
Dependent Claim
49 words
The test device of claim 1 wherein the carrier matrix is a bibulous material and the solution contains from 1,000 to 1,600 international units of glucose oxidase per milliliter, 600 to 1,300 international units of horseradish peroxidase per milliliter and from 10 to 15 milligrams per milliliter of m-anisidine.
Claim 4
Dependent Claim
26 words
The test device of claim 2 wherein the solution contains from 0.5 to 1.0 milligram per milliliter of a second chromogen having a high extinction coefficient.
References Cited (Backward Citations)
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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) | 1986-07-04 | 1987-01-03 | 1987-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-04 | 1991-01-03 | 1991-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-04 | 1995-01-03 | 1995-07-05 | $7700.00 | Window Closed / Lapsed |