Measuring and testing – With fluid pressure – Porosity or permeability
Reexamination Certificate
2006-01-31
2006-01-31
Chapman, John E. (Department: 2856)
Measuring and testing
With fluid pressure
Porosity or permeability
C073S433000
Reexamination Certificate
active
06990848
ABSTRACT:
A method is provided for nondestructively determining a material property of a porous sample. A first vessel is evacuated to a sub-atmospheric pressure, while a test pressure, greater than the sub-atmospheric pressure, is established in a second vessel containing the sample. The pressures of the first and second vessels are equalized by opening a valve mechanism therebetween. The resulting pressure change in the second vessel exhibits an initial pressure drop followed by a transition to an equalization pressure. The envelope volume of the sample is determined from a minimum pressure attained by the second vessel upon initial opening of the valve mechanism, wherein the minimum pressure is related to the initial pressure drop. The envelope density of the sample is thus a quotient of the mass and the envelope volume of the sample. The absolute density and relative absorption of the sample may also be determined and an associated system is provided.
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Bienvenu Michael Eric
Dummer Andrew Kirk
Troxler Robert Ernest
Alston & Bird LLP
Chapman John E.
Frank Rodney
Trxoler Electronic Laboratories, Inc.
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