Measuring and testing – With fluid pressure – Porosity or permeability
Reexamination Certificate
2006-05-09
2006-05-09
Williams, Hezron (Department: 2856)
Measuring and testing
With fluid pressure
Porosity or permeability
Reexamination Certificate
active
07040141
ABSTRACT:
A sample having a plurality of pores is located within a pressurizable chamber. The sample divides the chamber into a first volume and a second volume. A known amount of vapor is introduced into the first volume and the second volume at the same pressure (Px). After equilibrium is reached, pressure and decrease in volume of vapor are measured. Pore diameter and pore volume are calculated. A pressure differential is created between the two volumes, and the pressure change is monitored after the pressure differential is introduced. In a preferred embodiment, the pressure is increased in the first volume by a small percentage (ΔPx), and the pressure change on both sides of the sample is monitored after the pressure increase. The flow rate of the vapor is calculated using the pressure change. These steps are preferably repeated. The pore distribution in the sample is preferably calculated from the flow rates.
REFERENCES:
patent: 2465948 (1949-03-01), Welge
patent: 2534737 (1950-12-01), Rose
patent: 2612036 (1952-09-01), Angona
patent: 2709904 (1955-04-01), Hertel
patent: 2755660 (1956-07-01), Kammermeyer et al.
patent: 3286509 (1966-11-01), Gluckman et al.
patent: 3548634 (1970-12-01), Roy
patent: 3590634 (1971-07-01), Pasternak et al.
patent: 4203317 (1980-05-01), Gupta
patent: 4217336 (1980-08-01), Maire et al.
patent: 4576927 (1986-03-01), Kuroda et al.
patent: 4656865 (1987-04-01), Callan
patent: 4660412 (1987-04-01), Gupta
patent: 4744240 (1988-05-01), Reichelt
patent: 5245859 (1993-09-01), Smith et al.
patent: 5695818 (1997-12-01), Soffer et al.
patent: 5696198 (1997-12-01), Chereisky et al.
patent: 5955185 (1999-09-01), Yoshino et al.
patent: 6119506 (2000-09-01), Gibson et al.
patent: 0139202 (1985-05-01), None
patent: 0831318 (1998-03-01), None
patent: 1807341 (1993-04-01), None
patent: 229002 (1969-02-01), None
patent: 853492 (1981-08-01), None
patent: 1118900 (1984-10-01), None
patent: 1130772 (1984-12-01), None
Jena, Akshaya K. and Gupta, Krishna M.. “In-Plane Compression Porometry of Battery Separators.” Journal of Power Sources 80. 1999. p. 46-52.
Gupta, Vibhor and Jena, A.K.. “Substitution of Alcohol in Porometers For Bubble Point Determination.” Advances in Filtration and Separation Technology. Col. 13b, 1999 p. 833-844.
Gupta, Nalini and Jena, Akshaya. “Measuring in Layers: Determining the Pore Structure of Individual Layers of Multi-Layered Ceramic Composites.” Ceramic Industry, Feb. 2001. p. 28-33.
Jena, Akshaya K. and Gupta, Krishna M. “Detemination of Pore Volume and Pore Distribution by Liquid Extrusion Porosimetry Without Using Mercury” Ceramic Engineering and Science Proceedings, 2002, p. 277-284.
Thelen, E. “Soil Permeability Tester”, Franklin Institute Laboratories Notes: Franklin Inst. Journal, vol. 253, Apr. 1952, pp. 340-341.
“DWI-LB74 Porosity” http://www.dwi.twth-aachen.de/lb/74.html. Dec. 27, 1997.
Jena, Akshaya K. and Gupta, Krishna M. “A Novel Mercury Free Technique for Determination of Pore Volume, Pore Size and Liquid Permeability.” P/M Science & Technology Briefs, vol. 4, No. 1, 2002. pp. 5-8.
Jena, Akshaya K. and Gupta, Krishna M. “Materials Pore-Sight Testing Pore Volume and Flow Through Porous Materials” Materials World, The Journal of the Institute of Materials, vol. 10, Num. 2, Feb. 2002.
Gupta Krishna M.
Jena Akshaya
Brown & Michaels PC
Christensen Ryan
Porous Materials Inc.
Williams Hezron
LandOfFree
Capillary condensation method and apparatus for determining... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Capillary condensation method and apparatus for determining..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Capillary condensation method and apparatus for determining... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3529652