US PATENT SUBCLASS 95 / 285
.~ Coated or chemically treated filter
Current as of:
June, 1999
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95 /
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GAS SEPARATION: PROCESSES
273
DF
FILTERING
{7}
285
.~ Coated or chemically treated filter
DEFINITION
Classification: 95/285
Coated or chemically treated filter:
(under subclass 273) Process in which the filter is coated or in which the filter is treated with a chemical before its use for filtration.