Appeal No. 2006-1003
Application 10/046,535
essentially of a homopolymer selected from the group consisting
of polyhexamethylene dodecanedioamide, polyhexamethylene
adipamide and poly-,-caproamide, the other component being a core
consisting essentially of a random copolymer of hexmethylene
dodecanedioamide and ,-caproamide units” (col. 1, lines 36-45).
The core accepts acid dyes very readily, and disperse dyes
sometimes favor the core, leaving the sheath lighter in color
(col. 4, lines 20-24).
Lin discloses an acid-dye and coffee stain resistant carpet
(col. 1, lines 7-10; col. 2, lines 52-56; col. 6, lines 20-22)
comprising a backing material tufted with stain resistant
sheath/core bicomponent face fibers (col. 1, lines 7-9; col. 2,
lines 54-56). The weight ratio of the sheath to the core can be
10:90 (col. 1, lines 41-42). The face fibers comprise a core of
a first polyamide component which can be nylon 6 or nylon 6,6
(col. 1, lines 39-40), which are the appellants’ most preferred
core polyamides (specification, page 10, lines 5-6), covered by a
sheath which can be nylon 6,12 (col. 1, lines 43-47), which is
the appellants’ most preferred sheath polyamide (specification,
page 12, lines 2-3).
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Last modified: November 3, 2007