Appeal No. 2006-0415
Application No. 10/267,200
1 Read in the eye of one of ordinary skill in the art, this
2 description teaches that an epoxy system has a useful range of
3 viscosity from low to high and a useful life span. The question
4 more properly focused is, in the adhesive/film art, would one of
5 ordinary skill in the art have found it obvious to mix the
6 ingredients such that the resulting adhesive would have had a
7 viscosity at the claimed range for the claimed time at the claimed
8 temperature?
9 The examiner has concluded that the claimed ranges are
10 obvious because De Keyser describes an epoxy adhesive musty have
11 an initial low viscosity and thereafter the adhesivity after a few
12 minutes to several hours, (Examiner’s Answer, page 5, lines 12
13 et. seq.). Waddill is relied upon to describe that “low viscosity”
14 includes 7300 cps at 25°C. (Id., page 9, lines 16-18)(Waddill,
15 col. 7, lines 1-4 and 65-69). The motivation to use the epoxy
16 resin and curative resulting in the claimed viscosity is said to
17 come from the applied prior art considered as a whole.
18 Furthermore, the examiner has concluded that viscosity is a
19 recognized result effective parameter which is optimized. (Final
20 Rejection, June 2, 2004, page 4).
21 The appellant seems to be urging that “low viscosity” as used
22 in De Keyser and Waddill is somehow different from the claimed
23 range of 1,000 to 10,000 cps. We disagree. Low viscosity is a
12
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