Chromatographic flow cell and method of making it
US4575424A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1984 |
| Grant date | Mar 11, 1986 |
| Priority date | — |
| Expiry date | Mar 1, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/746
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
To accommodate microscale chromatographs, a flow cell has an inlet port, inlet path, light path, outlet path and outlet port, with the inlet and outlet paths being formed continuously around wires of the proper diameters during molding. The wires pass through the mold and against a metal light-path insert during molding and are removed from the plastic after molding to form portions of the inlet and outlet paths. The insert for the light path is formed in two parts, each having a groove in the form of a half cylinder along its center for the light path and having channels on each side. The paths are machined prior to lapping, and after lapping, the light path is coated with a bright metal such as rhodium and then it is burnished for a mirror image with a roughness of less than sixteen RMS micro inches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.