US4336330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for detecting glucose concentration
Assignee: Bayer Corp
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Filing: 1980-12-15
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Granted: 1982-06-22
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Expires: 2000-12-15
Abstract
Abstract A method and test device for determining the glucose concentration in a test sample containing from 1/2 to 10 percent glucose are disclosed. The method and test device involve impregnating the carrier with an enzymatic testing composition which includes glucose oxidase, peroxidase and a chromogen. The carrier is subsequently impregnated with from 0.5 to 1.5 percent by weight polystyrene. Contact of the carrier with a glucose-containing test sample produces a detachable response whereby the glucose concentration can be determined.
Inventors
- 👤 Robert Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:22
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/521; G01N33/523; 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: 5
Claim 1
Independent Claim
106 words
In a test device for detecting the presence of glucose in a test sample, wherein said device comprises a carrier matrix which has been impregnated with glucose oxidase, peroxidase and a chromogen, the improvement wherein the carrier matrix is impregnated with a solution of from 0.5 percent to 1.5 percent on a weight/volume basis, of polystyrene in a suitable organic solvent, where the impregnation with polystyrene is subsequent to the impregnation with glucose oxidase, peroxidase and chromogen, and where components are present in amounts and proportions such that the device is capable of detecting the presence of from 1/2 to 10 percent glucose in a sample.
Claim 2
Dependent Claim
106 words
In a test device for detecting the presence of glucose in a test sample, wherein said device comprises a carrier matrix which has been impregnated with glucose oxidase, peroxidase and a chromogen, the improvement wherein the carrier matrix is impregnated with a solution of from 0.5 percent to 1.5 percent on a weight/volume basis, of polystyrene in a suitable organic solvent, where the impregnation with polystyrene is subsequent to the impregnation with glucose oxidase, peroxidase and chromogen, and where components are present in amounts and proportions such that the device is capable of detecting the presence of from 1/2 to 10 percent glucose in a sample.
Claim 3
Dependent Claim
13 words
A test device as claimed in claim 1 wherein said carrier is paper.
Claim 4
Dependent Claim
22 words
A test device as claimed in claim 1 wherein the polystyrene is present in an amount of about 1.0 percent by weight.
Claim 5
Dependent Claim
20 words
A test device as claimed in claim 1 wherein the chromogen is a benzidine-type indicator or a substituted aniline indicator.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-21 | 1985-12-21 | 1986-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-21 | 1989-12-21 | 1990-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-21 | 1993-12-21 | 1994-06-22 | $7700.00 | Window Closed / Lapsed |