Appeal No. 2001-2397 Page 3
Application No. 08/855,779
products sometimes have [sic] processing difficulties such as compatibility with
other ingredients, solubility with certain other ingredients, clarity (when needed)
and stability under alkaline conditions.” Id. Several patents have also
“disclose[d] the use of hydrophobically modified nonionic cellulose ethers . . .
[having a] long chain alkyl carbon substitution in the hydrophobe (i.e., 8 to 24
carbons) for use in hair and skin care cosmetics.” Id., page 2.
The specification discloses that “hydrophobically modified
polysaccharide[s] having a short chain alkyl group in the hydrophobe moiety
have various advantageous properties over prior art water soluble
polysaccharides and their derivatives in personal care products.” Pages 2-3.
“The hydrophobically modified hydroxyalkylcellulose of the present invention is
an essential ingredient of the vehicle system of personal care products. . . .
Another ingredient that may be in the vehicle system is a surfactant that can be
either soluble or insoluble in the composition. A compatible solvent may also be
used in the vehicle system that can be either a single solvent or a blend of
solvents.” Specification, pages 4-5.
Personal care products containing the disclosed polysaccharides can also
contain “an active personal care component.” Specification, page 6. “[W]hen an
active personal care ingredient is needed, it must provide some benefit to the
user’s body.” Id. Examples of active personal care components include
perfumes, emollients, deodorants, and cleansing agents. See pages 6-7.
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