Diagnostic membrane containing fatty acid sarcosinate surfactant for testing oral fluid
US6194224A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 1998 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Jul 27, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/25125
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A diagnostic test strip for determining the presence of a specified analyte in a fluid sample is described. The test strip has a test membrane sandwiched between two layers of a plastic sheath. The upper layer of the sheath has a sample well into which a liquid sample is placed. The test membrane has a sample receiving zone typically containing a buffer and a fatty acid sarcosinate. Adjacent to the sample receiving zone is a reagent zone containing reagent chemicals including gold colloid particles coated with antibodies to the specified analyte. In fluid connection with the reagent zone is a test zone containing immobilized molecules of the specified analyte. Preferably, in fluid connection with the test zone is a control zone containing an indicator that changes color when wetted by the sample and a liquid sink zone to absorb excess liquid in the sample.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.