Appeal No. 2004-0049 Page 5
Application No. 10/047,626
(column 1, lines 57-60) that "[t]hrough the use of the first ply or layer of hard, high
flexural modulus resinous material on the core or center, a maximum coefficient of
restitution may be attained." The resinous material for the first ply or layer 14 is a
resinous material such as type 1605 Surlyn® which is a hard, high flexural modulus
resin which produces a substantial gain of coefficient of restitution over the coefficient
of restitution of the core or center. The outer layer, ply, lamination or cover 16 is a
resinous material such as type 1855 Surlyn® which is a comparatively soft, low flexural
modulus resinous material.
The appellant's disclosure teaches (pages 4-5) that (1) Surlyn® 1605 (now
designated Surlyn® 8940) is a sodium ion based low acid (less than or equal to 15
weight percent methacrylic acid) ionomer resin having a flexural modulus of about
51,000 psi; and (2) Surlyn® 1855 (now designated Surlyn® 9020) is a zinc ion based low
acid (10 weight percent methacrylic acid) ionomer resin having a flexural modulus of
about 14,000 psi.
Horiuchi's invention relates to a golf ball having excellent impact resilience and
flying performance, of which the cover is formed from an ionomer resin which contains
an alpha, beta-ethylenic unsaturated carboxylic acid in a larger amount than
conventional ionomer resins. In the background of the invention, Horiuchi provides that
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