Appeal 2007-1943
Application 10/443,649
Properties of Low Sulfur Petroleum Feedstock of Claims 8(1) and 25(11)
Softening Point, Mettler, 70-130 oC
Coking Value, Conradson Carbon 38 wt% min.
Sulfur 1.00 wt% max.
Ash 0.2 wt% max.
Quinoline Insolubles 0.5 wt% max.
Toluene Insolubles 2.0-10.0 wt%
Flash Point 250 oC min.
Density ~1.20 g/cc min.
Furthermore, interpreting the claim language as a whole, we conclude
that the steps in Claims 1 and 11 of “producing a resulting, low PAH, low
sulfur petroleum pitch feedstock having a sulfur content less than 1 wt% and
less than 15,000 mg/kg of PAH” (1) do not require that significant amounts
of PAH exist in the initial supply of petroleum feedstock to be hydrotreated;
(2) do not require that the level of PAH in the initial supply of petroleum
feedstock must be reduced by the hydrotreatment, at least to the extent that
less than 15,000 mg/kg of PAH existed in the initial supply of petroleum
feedstock; and (3) do not require that the level of PAH in the initial supply
of petroleum feedstock must be reduced by the hydrotreatment to levels
significantly lower than 15,000 mg/kg of PAH. In short, the supply of
petroleum feedstock need not ever have contained measurable amounts of
PAH before hydrotreatment, need not contain less than initial low levels of
PAH after hydrotreatment, and need not contain levels of PAH significantly
lower than 15,000 mg/kg of PAH after hydrotreatment.
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