Method of measuring the transmission rate of a permeant through a container and determining shelf life of a packaged product within the container
US7624622B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2007 |
| Grant date | Dec 1, 2009 |
| Priority date | — |
| Expiry date | Jul 16, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/0081
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of measuring the transmission rate of a permeant through a container and determining shelf life of product within the container based upon loss of the permeant through the container. The method includes the steps of (i) placing a sealed container containing a perishable product and a permeant within a sealed retention chamber, (ii) periodically measuring concentration of the permeant within the headspace of the retention chamber until a substantially steady state increase in permeant concentration within the headspace is sensed, and (iii) calculating a shelf life for the sealed container by dividing an amount of permeant loss, previously established as correlating to product expiration, by the sensed steady state increase in permeant concentration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.