Filter with ePTFE and method of forming

Gas separation – Specific media material – Fibrous or strand form

Reexamination Certificate

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Details

C055S487000, C055S486000, C055S528000, C055S522000, C055S524000, C055S521000, C095S285000, C095S286000, C095S287000

Reexamination Certificate

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07837756

ABSTRACT:
A filter media product and method of making the same wherein the filter media is pleatable and has at least one support scrim comprised of a melt bonded non-woven material or a fuse bonded non-woven material bonded to a layer of expanded polytetrafluoroethylene. The filter media may have a single support scrim with one or more layers and optionally may have a support scrim on both an upstream and downstream surface where both or neither support scrim is multilayered. The filter media may have an efficiency greater than, equal to, or less than HEPA.

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U.S. Patent and Trademark Office (ISA/US); International Search Report and the Written Opinion of the International Searching Authority, or the declaration; Mar. 9, 2009; pp. 1-15; U.S. Patent and Trademark Office; U.S.

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