Appeal No. 2002-1559 Page 3
Application No. 09/282,708
settling of suspended material. The specification notes that crystalline
suspending agents and inorganic structurants are commonly used suspending
agents, and states that “they can adversely affect lathering performance and
impart an undesirably cloudy appearance to the composition,” and that “they
tend to get co-deposited along with the ingredients it is desired to deposit, which
can lead to dulling of the hair through excessive build up and reduced
performance.” Id. at 1.
The specification teaches that a number of polymers of biological origin,
such as agar, carrageenan, furcelleran, gellan and pectin, when in aqueous
solution, form reversible gels, wherein they melt when heated but revert to a gel
when cooled down. Id. at 2.
According to the specification,
hair treatment compositions comprising a continuous phase formed
from such shear gels display excellent resistance to phase
separation and settling of suspended materials. The shear gels are
tolerant to the presence of surfactant, and may under some
circumstances boost the conditioning performance of the hair
treatment composition.
Id. at 4.
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