Appeal No. 1997-1795
Application No. 08/442,617
random block copolymer of polypropylene and
polyethy-lene having a melting point of below 160°C
and having about 3 percent random ethylene molecules
and about 9 percent block ethylene molecules.
The examiner relies upon the following references as
evidence of obviousness:
Kunimune et al. (Kunimune) 4,211,819 Jul. 08, 1980
Gessner 5,108,827 Apr. 28, 1982
Canadian Patent Application 2,126,014 Jun. 16, 1994
(Canadian '014)
Appellants' claimed invention is directed to a nonwoven
fabric comprising a biconstituent blend of polypropylene
having the recited isotacticity and a random block copolymer
of polypropylene and polyethylene having the recited amounts
of random ethylene molecules and block ethylene molecules.
Appealed claims 6-11 and 14 stand rejected under 35
U.S.C.
§ 103 as being unpatentable over Gessner in view of Kunimune
or Canadian '014.
Upon careful consideration of the opposing arguments
presented on appeal, we will not sustain the examiner's
rejection.
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