Measuring and testing – With fluid pressure – Porosity or permeability
Reexamination Certificate
2007-05-24
2009-12-01
Fitzgerald, John (Department: 2856)
Measuring and testing
With fluid pressure
Porosity or permeability
Reexamination Certificate
active
07624622
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.
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Mayer Daniel W.
Tuomela Stephen D.
Fitzgerald John
Mocon, Inc.
Sherrill Law Offices PLLC
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