Method and apparatus for reducing error when measuring minute quantities of weight
US6903281B2 · kind B2 · utility
1Cited by
9References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2002 |
| Grant date | Jun 7, 2005 |
| Priority date | — |
| Expiry date | Feb 11, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01G1/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to an instrument and method for measuring minute quantities of weight, including a pan for holding a sample to be weighed, a chamber for forming an enclosure about the pan, and a hang-down wire coupled to the pan for suspending the pan within the chamber. The pan has volume less than 0.020 cm3 and the hang-down wire has a volume less than 0.01 cm3. The invention may also include a carrier gas, placed within the chamber, having a generally consistent density over changes in temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.