Sample holder and transferring device for a centrifuge
Abstract
Abstract KNOWN ROTARY PHOTOMETRIC ANALYZERS HAVE A SERIES OF CUVETTES ARRANGED VERTICALLY AND CONCENTRICALLY AROUND A HORIZONTALLY ROTATABLE DISK SO THAT WHEN THE DISK IS ROTATED CENTRIFUGAL FORCE MIXES AND TRANSFERS REAGENTS AND SAMPLES TO THE CUVETTES. AS EACH CUVETTE PASSES A LIGHT SOURCE THE SAMPLES ARE ANALYZED PHOTOMETRICALLY BY PROJECTING A LIGHT BEAM THROUGH THE BOTTOM OF THE CUVETTE AND MEASURING THE ABSORBENCE AS THE BEAM EMERGES FROM THE TOP OF THE CUVETTE. IN THE IMPROVEMENT OF THIS INVENTION THE ANALYZER IS PROVIDED WITH A SAMPLE HOLDER AND TRANSFERRING DEVICE HAVING REAGENT, SAMPLE AND TRANSFER CHAMBERS DISPOSED IN SUCH A GEOMETRIC CONFIGURATION THAT THE ENTIRE SAMPLE IS PICKED UP IN THE REAGENT AND SWEPT INTO THE CUVETTE.
Inventors
- 👤 Stephen I Shapiro
Bibliographic Details
Claims Analysis
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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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |