Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Light transmittance type analytical system and variable transmittance optical component and test device for use therein










Image Number 7 for United States Patent #5431880.

A light transmittance type analytical system for the rapid quantitation of minute amounts of an analyte in a fluid sample and an optical component and test device useful therein are; disclosed. The analytical system employs an assay in which the presence of the analyte in the assayed sample is productive of an insoluble substantially opaque, light absorptive colored end product. In the preferred use of the analytical system, the end product is formed in contact with a light and fluid permeable optical component in the form of a matrix of compacted substantially water insoluble granules of reflective material which has a light scattering coefficient of at least about 80 and is substantially nonabsorptive of light. Contact of particles of the end product with granules of the matrix causes a rapid and dramatic reduction in the light transmittance capability of the matrix which is monitored by the instrument to provide amplified quantitation of the analyte, which quantitation results from the two-fold effect of direct absorption of light by the end product, and reduction of the light scattering coefficient of the matrix granules caused by contact thereof by the end product. The instrument performs all of the steps of the assay when the test device is in operative position therein, and is well adapted for preprogrammed automated operation under computer control.








 
 
  Recently Added Patents
Once daily formulations of tetracyclines
Reliability fire pressure switch
Cavernous nerve stimulation via unidirectional propagation of action potentials
Architectural panel with bamboo rings heavy density embossed surface
Radiation imaging device
Earphone
Motor and disk drive apparatus
  Randomly Featured Patents
Circular saw alignment system and method
Multi-outlet electrical adapter
Foot orthotic for safe ambulation
Apparatus for manually and automatically processing microelectronic workpieces
Laminated film, filter for display, and display
Method and arrangement for calibrating an active filter
Side element of a shoe upper
Temporary assembly clip for snap-fit gear boxes
Mechanical device for holding elastic articles
Lever-type cork extractor