Appeal No. 2005-0846
Application No. 09/981,339
invention of Conroy (col. 25, ll. 53-55) are ordinarily opaque,
e.g., siding, roofing, door striping, etc. Thus, it would not
appear that the invention disclosed by Conroy is limited
exclusively to use with clear resin formulations.
REJECTION (3)
This rejection is also affirmed.
Duvall and EP each disclose stabilizer compositions much
like those of Conroy for halogen-containing polymers, including a
latent (blocked) mercaptan, a metal-based stabilizer (e.g., a
zinc carboxylate such as zinc stearate or zinc laurate), and a
Lewis acid (e.g., zinc chloride). The metal-based stabilizer may
be present in amounts from about .01 to less than .5 %. The
Lewis acid may be present in amounts from .005 to less than .5%.
All the percentages are by weight of the resin. Clearly, the
total percentage of the metal-based stabilizer and the Lewis acid
may exceed .5%, when used in combination as suggested in Duvall
(col. 10, ll. 34-36) as well as in EP (p. 9, ll. 46-7).
We agree with the examiner that it would have been prima
facie obvious, within the purview of 35 U.S.C. § 103, to select
any of the Lewis acids disclosed in Duvall or EP, such as zinc
chloride, to be used in combination with one of the preferred
metal-based stabilizers, such as a zinc carboxylate, absent a
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