Appeal No. 2006-2369 Page 4
Application No. 10/169,618
(O - CO - NH - R) represents an N-alkyl aminocarbonyloxy group
replacing a hydroxyl group of the glucosyl unit A, and wherein R represents a
linear or branched, saturated or unsaturated alkyl group containing from 3 to 22
carbon atoms, and
s represents the number of alkyl carbamate groups per glucosyl unit which
number is expressed as a degree of substitution (DS) with said DS value ranging
from about 0.01 to about 2.0.
Thus, claim 9 is directed to an organic compound comprising a plurality of “units”
described by formula (II). Formula (II) requires each unit to be composed of a glucose
molecule with an alkyl carbamate group covalently bound to it. The glucose molecule of
formula (II) is, in turn, a subunit of a larger glucose polymer produced by starch
hydrolysis, the hydrolysate having a D.E. of 1 to 47.
The alkyl portion of the unit described by formula (II) may be linear or branched,
saturated or unsaturated, and contains 3 to 22 carbon atoms. Each glucose molecule
within the hydrolyzed starch moiety may be substituted with about 0.01 to about 2.0
alkyl groups. Thus, for example, a hydrolyzed starch moiety having 100 glucose
subunits may have from about 1 to about 200 alkyl carbamate groups covalently bound
to it.
Claim 14, the only process claim, reads as follows (paragraphs, spacing and
indentation added):
14. Process for the manufacture of a glucoside alkyl urethane (I) as defined in
claim 9, comprising
reacting a starch hydrolysate with a D.E. between 1 and 47, dissolved in a
first solvent, with such an amount of alkyl isocyanate that an urethane (I) is
yielded having a degree of substitution (DS) ranging from 0.01 to 2.0, the first
solvent being inert with respect to the glucoside, the isocyanate and the urethane
(I), followed
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