Gas separation – Specific media material – Ceramic or sintered
Reexamination Certificate
2005-03-01
2005-03-01
Smith, Duane (Department: 1724)
Gas separation
Specific media material
Ceramic or sintered
C055S521000, C055SDIG005, C264S005000, C264S112000, C264S113000, C264S165000, C264S624000, C264S628000, C264SDIG004, C156S062800
Reexamination Certificate
active
06860917
ABSTRACT:
A method for making high temperature filter media is provided by melt-spinning a plurality of fibers of preceramic thermoplastic polymer to form a nonwoven textile web of the fibers, curing and cross-linking the thermoplastic polymer to a thermoset polymer, and thermally decomposing the thermoset polymer to ceramic. Between the melt-spinning step and the curing step, the web is formed to a filter pre-form in a green state while still pliable and malleable. The filter pre-form is cured without re-melting the thermoplastic polymer and without destroying morphology.
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Haberkamp William C.
Henrichsen Matthew P.
Mullins, Jr. Gene A.
Andrus Sceales Starke & Sawall LLP
Fleetguard Inc.
Greene Jason M.
Smith Duane
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