Microbial detection and enumeration apparatus
US4200493A · kind A · utility
39Cited by
1References
9Claims
0Family size
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Key dates
| Filing date | Dec 2, 1976 |
| Grant date | Apr 29, 1980 |
| Priority date | — |
| Expiry date | Dec 2, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12Q2304/80
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
The presence of microorganisms in a sample is determined by culturing microorganisms in a growth medium which is in contact with a measuring electrode and a reference electrode and detecting the change in potential between the electrodes which arises by the migration and accumulation of said microorganisms adjacent the surface of the measuring electrode thus forming a charge-charge interaction between said measuring electrode and accumulated microorganisms, by measuring the potential change with a high impedance potentiometer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.