Appeal No. 1996-1127
Application No. 07/975,587
Having carefully considered the respective positions set forth by appellants and the
examiner, we find no error in the examiner’s determination that claim 1 is unpatentable
under 35 U.S.C. § 103 over Branan.
The following Table I compares the properties of appellants' carbon black recited in
claim 1 with the properties of Branan's carbon black set forth in column 3, lines 32 through
36.
Table I
Property Branan Claim 1 Comment
2
N SA (m /g) 120 - 180 $ 100 within claimed
2
range
CDBP (cc/100g) 95 - 120 $ 105 overlapping ranges
*
TINT 96 - 176 90 - 140 overlapping ranges
@ #
Dmode (nm) 66 - 125 61 - 118 overlapping ranges
)D50/Dmode 0.8 - 1.05 0.6 - 0.8 same end point &
overlapping ranges
* The range of the TINT value of the carbon black taught by Branan was calculated from the relationship of
TINT/CTAB ratio of 0.80-1.10 with CTAB 120-160.
@ The range of the Dmode of the carbon black taught by Branan was calculated from )D50/Dmode ratio
of 0.80-1.05 and )D50 of 70-100.
# The claimed range of the Dmode (nm) was calculated from the relationship Dmode $ 218 - 1.12(TINT)
wherein TINT is between 90-140.
3
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