Appeal No. 1997-2837 Page 2
Application No. 08/377,365
invention can be derived from a reading of exemplary claim 1,
which is reproduced below.
1. A biaxially oriented, multilayer polypropylene film
comprising at least one base layer B, at least one interlayer Z
and at least one top layer D, wherein the film contains an
effective amount of at least one migrating additive, the total
amount of migrating additive or additives being not more than
0.15% by weight, based on the total weight of the film; wherein,
if the migrating additive is silicone oil, the silicone oil has a
viscosity in the range from 5,000 to 1,000,00 mm /s; and wherein,2
prior to the migrating of any said migrating additive, said base
and top layer or layers is or are essentially free of migrating
lubricant additives and migrating antistatic additives.
The prior art references of record relied upon by the
examiner in rejecting the appealed claims are:
Bothe 5,151,317 Sep. 29, 1992
Murschall et al. (Murschall) 5,246,769 Sep. 21, 1993
Peiffer et al. (Peiffer) 5,292,563 Mar. 08, 1994
Schuhmann et al. (Schuhmann) 5,326,625 Jul. 05, 1994
Claims 1, 3-7, 9-11 and 13-18 stand rejected under 35 U.S.C.
§ 103 as being unpatentable over Bothe in view of Peiffer.
Claims 8 and 12 stand rejected under 35 U.S.C. § 103 as being
unpatentable over Bothe in view of Peiffer further taken with
Schuhmann or Murschall.
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