Appeal No. 2003-0580
Application No. 09/139,081
Claim 41 is illustrative:
41. An ozone fade resistant dyed carpet comprising:
a backing material; and
dyed sheath/core face fibers affixed to said backing
material and bound thereto, said face fibers having (i)
at least about 70 wt.% of a core formed of at least one
fiber-forming core nylon selected from the group
consisting of nylon-6, nylon 6,6 and copolymers and
blends thereof, and (ii) a sheath substantially or
completely covering said core formed of a fiber-forming
sheath nylon selected from nylon 6,12 and copolymers
thereof which exhibit inherent chemical compatibility
with the core nylon and which is acid dye resistant,
wherein
said dyed sheath/core face fibers are dyed with an acid
dye and have a resistance to ozone fading
indicated by a CIE L*a*b* total color
difference from the original unexposed dyed
sheath/core face fibers after at least 3
cycles of ozone fading that is less than
one-half of the CIE L*a*b* total color
difference seen for a fiber composed
substantially completely of said core nylon
that is dyed with the same acid dye.
THE REFERENCES
Ida et al. (Ida ‘901) 3,918,901 Nov. 11, 1975
Ida et al. (Ida ‘973) 3,927,973 Dec. 23, 1975
Chambers et al. (Chambers) 4,762,524 Aug. 09, 1988
Jenkins 5,085,667 Feb. 04, 1992
Lin 5,447,794 Sep. 05, 1995
(filed Sep. 07, 1994)
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