US4318985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for detecting glucose concentration
Assignee: Bayer Corp
•
Filing: 1981-01-29
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Granted: 1982-03-09
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Expires: 2001-01-29
Abstract
Abstract A method and test device for determining the glucose concentration in a test sample containing from 1/2 to 5 percent glucose. The method and test device involve incorporating urea-formaldehyde resin in a carrier matrix and subsequently impregnating the carrier with an enzymatic testing composition which includes glucose oxidase, a peroxidatively-active compound and a chromogen. Contact of the carrier with a glucose-containing test sample produces a detectable response whereby the glucose concentration can be determined.
Inventors
- 👤 Robert Bauer
- 👤 Myron C. Rapkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:16
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/54; Y; Y10; Y10S; Y10S435/00; Y10S435/805
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
57 words
In a test device for detecting the presence of glucose in a test sample, wherein said device comprises a carrier matrix incorporated with glucose oxidase, a peroxidatively-active compound and a chromogen, the improvement wherein the carrier matrix is incorporated with from 0.005 percent to 2.5 percent by weight urea-formaldehyde resin wherein there is formed a cross-linked polymer.
Claim 2
Dependent Claim
57 words
In a test device for detecting the presence of glucose in a test sample, wherein said device comprises a carrier matrix incorporated with glucose oxidase, a peroxidatively-active compound and a chromogen, the improvement wherein the carrier matrix is incorporated with from 0.005 percent to 2.5 percent by weight urea-formaldehyde resin wherein there is formed a cross-linked polymer.
Claim 3
Dependent Claim
14 words
A test device as claimed in claim 1 wherein said carrier matrix is paper.
Claim 4
Dependent Claim
22 words
A test device as claimed in claim 1 wherein the urea-formaldehyde is present in an amount of about 0.01 percent by weight.
Claim 5
Dependent Claim
26 words
A test device as claimed in claim 1 wherein the chromogen is a benzidine-type indicator or a substituted aniline indicator and the peroxidatively-active compound is peroxidase.
Claim 6
Dependent Claim
32 words
A method for determining the glucose concentration in a test sample containing from about 1/2 to 5 percent glucose which comprises contacting said test sample with the test device of claim 1.
Claim 7
Dependent Claim
32 words
A method for determining the glucose concentration in a test sample containing from about 1/2 to 5 percent glucose which comprises contacting said test sample with the test device of claim 2.
Claim 8
Dependent Claim
32 words
A method for determining the glucose concentration in a test sample containing from about 1/2 to 5 percent glucose which comprises contacting said test sample with the test device of claim 3.
Claim 9
Dependent Claim
32 words
A method for determining the glucose concentration in a test sample containing from about 1/2 to 5 percent glucose which comprises contacting said test sample with the test device of claim 4.
Claim 10
Dependent Claim
59 words
A method for preparing the test device of claim 1 which comprises the steps of impregnating a carrier with 0.005 percent to 2.5 percent by weight urea-formaldehyde resin wherein there is formed a cross-linked polymer and subsequently impregnating the carrier with a composition effective to determine the presence of from 1/2 to 5 percent glucose in a test sample.
Claim 11
Dependent Claim
50 words
In a method for preparing a test device for the determination of glucose which includes contacting a carrier with a composition effective to determine said glucose, the improvement wherein said carrier is incorporated with from 0.005 to 2.5 percent by weight urea-formaldehyde resin wherein there is formed a cross-linked polymer.
Claim 12
Dependent Claim
50 words
In a method for preparing a test device for the determination of glucose which includes contacting a carrier with a composition effective to determine said glucose, the improvement wherein said carrier is incorporated with from 0.005 to 2.5 percent by weight urea-formaldehyde resin wherein there is formed a cross-linked polymer.
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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) | 1985-03-08 | 1985-09-07 | 1986-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-08 | 1989-09-07 | 1990-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-08 | 1993-09-07 | 1994-03-09 | $7700.00 | Window Closed / Lapsed |