Melt blown composite HEPA vacuum filter
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Feb 4, 2003
Grant Date -
Nov 29, 2001
app pub date -
Mar 12, 2001
filing date -
Mar 15, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electret filter media includes an additive or mixtures thereof that enhance the charge stability of the media. The filter media achieves acceptable alpha values for a range of filtration challenges without significant decay in alpha values over time. Preferred charge additives include fatty acid amides and mixtures thereof.
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