US 6,982,007 B2 | ||
Divided pressure vessel apparatus for carbon dioxide based systems and methods of using same | ||
Steven L. Worm, Raleigh, N.C. (US); James P. DeYoung, Durham, N.C. (US); James B. McClain, Raleigh, N.C. (US); and David E. Brainard, Wake Forest, N.C. (US) | ||
Assigned to Micell Technologies, Raleigh, N.C. (US) | ||
Filed on Oct. 29, 2003, as Appl. No. 10/695,544. | ||
Application 10/695544 is a division of application No. 09/976551, filed on Oct. 12, 2001, granted, now 6,734,112. | ||
Claims priority of provisional application 60/240473, filed on Oct. 13, 2000. | ||
Prior Publication US 2004/0102042 A1, May 27, 2004 | ||
Int. Cl. B08B 3/08 (2006.01); D06F 43/00 (2006.01); H01L 21/302 (2006.01) |
U.S. Cl. 134—11 | 30 Claims |
1. A dry cleaning method comprising the steps of:
transferring a first densified gas based dry-cleaning solution from a first liquid chamber defined in a divided working tank
to a wash tank containing a dry-cleanable article;
contacting the dry-cleanable article with the first dry-cleaning solution;
returning the first dry-cleaning solution from the wash tank to the divided working tank;
transferring a second densified gas based dry-cleaning solution from a second liquid chamber defined in the divided working
tank to the wash tank;
contacting the dry-cleanable article with the second dry-cleaning solution; and
returning the second dry-cleaning solution from the wash tank to the divided working tank;
wherein the first and second liquid chambers share a common vapor space.
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