Appeal 2007-0321
Application 10/669,547
thioglycolates typically formulated at high pH. Effectiveness requires
prolonged residence time on the skin, generally for greater than four
minutes” (Specification 1). Because of the conditions used in chemical hair
removal, “[s]ignificant irritation and inflammatory response can arise from
the procedure, particularly experienced by those with sensitive skin” (id.).
The Specification discloses that “the irritation associated with
chemical depilation of hair can be reduced or eliminated without loss of
efficiency. Pretreatment of the depilation area with lipophilic materials
significantly protects skin from redness/erythema” (id. at 4). The
Specification discloses that “[d]espite an underlying layer of the lipophilic
material, chemical reaction by the keratin degrading actives remains
unimpeded. The desired hair removal is achieved without extending
residence time of the actives” (id.).
The Specification discloses that useful lipophilic materials “include
oils such as hydrocarbons, natural or synthetic esters and silicones. Among
the hydrocarbons suitable examples are mineral oil, isoparaffins, petroleum
jelly (petrolatum), polymerized olefins (e.g. polybutenes, polydecenes,
isohexadecane) and combinations thereof” (id.).
DISCUSSION
1. CLAIMS
Claims 1-17 are pending and on appeal. Claims 1 and 7 are
representative and read as follows:
Claim 1. A method for removing hair comprising:
(i) applying to an area of skin from which hair is to be
removed a skin pretreatment composition that
comprises from 90 to 100% of lipophilic materials
by weight of the pretreatment composition; and
2
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