In vitro homogenous DNA and RNA cell blocks made using a multi-chambered rotating apparatus
US10197479B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2016 |
| Grant date | Feb 5, 2019 |
| Priority date | — |
| Expiry date | Aug 8, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2001/366
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Homogenous DNA or RNA cell blocks used as a standard and comprising uniformly distributed cells, or ratio of cells, for use as a positive control for a biomarker in immunohistochemistry slide scanning and image analysis. The cell blocks are made using a Homogenous Cell Mixture (HCM) apparatus comprising a rotating multi-tiers that de-clump and filter single cells downward to mix with a fixation liquid-3% agarose. The uniform rotation of the tiers is under the operational control of a motorized mechanism, and results in a cell mixture comprising a constant density of cells, which is then transferred into molds to make formalin fixed paraffin embedded (FFPE) cell blocks. The size of the molds is also determined based upon a computation that factors in the total number of cells (e.g. density) in a cell block that a user desires, and the total cell volume for a specific cell type selected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.