Heatable pipette
US7438861B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2007 |
| Grant date | Oct 21, 2008 |
| Priority date | — |
| Expiry date | May 16, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2035/00425
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A heatable pipette, with a needle has an inner channel defined by an inner wall, arranged to conduct electric current through the inner wall for resistively heating the inner wall. The needle has an outer wall, which is defined between the outer wall and the inner wall and connectable for providing pressure air into the outer channel. By conducting current directly through the inner wall, the inner wall itself operates as resistor. Particularly, if the inner wall is made of an appropriate material, for example of stainless steel, the ohmic resistance of the inner wall is not negligible even if the inner wall is very thin. Therefore, the inner wall can directly be used as resistor for resistance heating of the inner wall even if the needle is manufactured in small dimensions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.