Appeal No. 2006-2369 Page 5
Application No. 10/169,618
(i) by precipitation of the formed urethane (I), optionally after partial
removal of the first solvent by evaporation under reduced pressure, either
by addition under stirring of a precipitant solvent to the reaction
mixture or
by slowly pouring under stirring the, optionally concentrated,
reaction mixture into a precipitant solvent,
followed by isolation of the precipitated urethane (I), treating or
washing of the urethane (I) with a precipitant solvent, and drying of the
obtain urethane (I), or
(ii) by spraying the reaction mixture in a stream of CO2 under about 200
bar, with subsequent isolation, optionally washing with a precipitant
solvent, and drying of the obtained urethane (I).
Thus, claim 14 is directed to preparing the product recited in claim 9 by reacting
a starch hydrolysate with an alkyl isocyanate compound, in an inert solvent, then
recovering the glucoside alkyl urethane product by, e.g., precipitating it, washing it with
the precipitant solvent, and drying the product.
2. Obviousness
The examiner has rejected claims 1-7, 9, and 11-33, all of the pending claims,
under 35 U.S.C. § 103 on the basis that the claimed subject matter would have been
obvious in view of Japanese Patent Document 05-043649 (“Sony ‘649”) 1 and Japanese
Patent Document 05-042775 (“Sony ‘775”).2
Sony ‘649 discloses the preparation of polysaccharide urethane derivatives
which are suitable for use as components of a “video photographic paper” coating.
Sony ‘649, English translation, at [0051]. The examiner cites Sony ‘649 as teaching
urethane modified polysaccharides in which the hydroxyl group of the polysaccharide is
1 Kobayashi et al., JP 05-043649, published February 23, 1993
2 Kobayashi et al., JP 05-042775, published February 23, 1993
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