Appeal No. 2003-0824 Page 2
Application No. 09/713,974
16. The process of claim 1 wherein the chitosan has a particle size of
from about 0.1 to about 10 microns.
17. A safety razor blade unit having an area containing chitosan.
The examiner relies on the following references:
Nakane et al. (Nakane) 5,182,103 Jan. 26, 1993
Marchi et al. (Marchi) 5,643,672 Jul. 1, 1997
Keil et al. (Keil) 5,690,924 Nov. 25, 1997
Oldroyd 5,903,979 May 18, 1999
Sampino et al. (Sampino) 6,093,386 Jul. 25, 2000
Sine et al. (Sine) 6,183,766 B1 Feb. 6, 2001
Claims 1, 8, 9, 11, 13, and 14 stand rejected under 35 U.S.C. § 103 as
obvious in view of Sampino and Sine.
Claims 2, 15, and 16 stand rejected under 35 U.S.C. § 103 as obvious in
view of Sampino, Sine, Keil, and Nakane.
Claims 3-7 stand rejected under 35 U.S.C. § 103 as obvious in view of
Sampino, Sine, Keil, Nakane, and Marchi.
Claims 12, 17, and 18 stand rejected under 35 U.S.C. § 103 as obvious in
view of Sampino, Sine, Keil, Nakane, and Oldroyd.
We reverse.
Background
Chitin is a polymeric compound derived from natural products such as
crustacean shells. See the specification, page 3. Chitosan is derived from chitin
by deacetylation. Id. The specification discloses that applying a chitosan-
containing formulation to the skin reduces skin irritation caused by shaving.
Page 1. The chitosan can be applied either before or after shaving. See page 4.
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