Appeal 2007-1943
Application 10/443,649
Coking Value, Conradson Carbon 38 wt% min. “preferably greater
(Claims 8 & 25) than about 30%
but not greater
than about 65%”
(col. 4, ll. 51-54);
“preferably greater
than about 10%
but less than
about 65%”
(col 5, ll. 3-6)
Sulfur 1.00 wt% max. 0.45-0.79 wt%
(Claims 8 & 25) (Table 1, col. 10)
Ash 0.2 wt% max. -
Quinoline Insolubles 0.5 wt% max. -
Toluene Insolubles 2.0-10.0 wt% -
Flash Point 250oC min. -
Density ~1.20 g/cc min. -
Didchenko does not disclose information relating to “Ash”,
“Quinoline Insolubles”, “Toluene Insolubles”, “Flash Point” and “Density”
for any of the low sulfur precursor pitch feedstock it produces. Moreover,
Didchenko does not specify the level of PAH in the low sulfur precursor
pitch feedstock it produces. However, Didchenko’s disclosure is directed to
persons having ordinary skill in the art, with all reasonably attributable
knowledge of the art (Didchenko, col. 3, ll. 4-21; emphasis added):
It would be desirable to subject the high sulfur decant oil to a
hydrodesulfurization in accordance with known processes such as
taught in U.S. Pat. No. 4,075,084 to Skripek et al or U.S. Pat. No.
10
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