US4524133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Test device for lactase activity in a meconium sample
Assignee: Bayer Corp
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Filing: 1983-08-19
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Granted: 1985-06-18
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Expires: 2003-08-19
Abstract
Abstract A test device for the detection of lactase activity in a meconium sample is disclosed. The test device is a carrier matrix which has lactose, a glucose assay system and a nonionic detergent incorporated therein.
Inventors
- 👤 Richard J. Tyhach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:49
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/26; C12Q1/28; C12Q1/54; C12Q2326/00; C12Q2326/10; C12Q2326/12; Y; Y10; Y10S; Y10S435/00; Y10S435/805
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
45 words
A test device for the detection of lactase activity in a meconium sample which comprises a carrier matrix incorporated with a composition comprising 1 to 4 percent by weight lactose, 3,3',5,5'-tetraalkylbenzidine indicator, glucose oxidase, and 0.1 to 1 percent by weight of a nonionic detergent.
Claim 2
Dependent Claim
45 words
A test device for the detection of lactase activity in a meconium sample which comprises a carrier matrix incorporated with a composition comprising 1 to 4 percent by weight lactose, 3,3',5,5'-tetraalkylbenzidine indicator, glucose oxidase, and 0.1 to 1 percent by weight of a nonionic detergent.
Claim 3
Dependent Claim
18 words
The test device of claim 1 in which the composition incorporated into the carrier matrix also contains peroxidase.
Claim 4
Dependent Claim
15 words
The test device of claim 1 in which the nonionic detergent is polyethoxy fatty alcohol.
Claim 5
Dependent Claim
17 words
The test device of claim 1 in which the carrier matrix is attached to a polystyrene substrate.
Claim 6
Dependent Claim
19 words
The test device of claim 1 in which the composition also contains an interpolymer of methylvinylether and maleic anhydride.
Claim 7
Dependent Claim
51 words
Test device for detection of lactase activity in a meconium sample which comprises a carrier matrix incorporated with a composition comprising 1 to 4 percent by weight lactose, 3,3',5,5'-tetramethylbenzidine, glucose oxidase, peroxidase, 0.1 to 1 percent by weight polyethoxy oleyl alcohol, an interpolymer of methylvinylether and maleic anhydride and polyvinyl pyrrolidone.
Claim 8
Dependent Claim
51 words
Test device for detection of lactase activity in a meconium sample which comprises a carrier matrix incorporated with a composition comprising 1 to 4 percent by weight lactose, 3,3',5,5'-tetramethylbenzidine, glucose oxidase, peroxidase, 0.1 to 1 percent by weight polyethoxy oleyl alcohol, an interpolymer of methylvinylether and maleic anhydride and polyvinyl pyrrolidone.
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) | 1988-06-17 | 1988-12-17 | 1989-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-17 | 1992-12-17 | 1993-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-17 | 1996-12-17 | 1997-06-18 | $7700.00 | Window Closed / Lapsed |