Appeal 2007-2082
Application 10/795,457
According to Appellant, the invention is directed to a method of
producing a customized molding material by adding to dry gypsum-
containing molding material an aqueous solution of polytetrafluoroethylene
(PTFE) (Br. 2). Independent claim 1 is representative of the invention and is
reproduced below:
1. A method of producing, without a polymerization step such as
heating, a customized hardening molding materials comprising the
steps of:
(a) preparing an aqueous moistening solution containing from
0.001 to 35% polytetrafluoroethylene, and
(b) then moistening dried gypsum containing molding material
with the solution prepared in step a.
The Examiner has relied upon the following prior art references as
evidence of unpatentability:
Morrell US 3,620,778 Nov. 16, 1971
Wada US 5,154,771 Oct. 13, 1992
Horiuchi US 5,718,749 Feb. 17, 1998
Hoshino JP 53-149224 Dec. 26, 1978
(as translated)
ISSUES ON APPEAL
Claims 1, 3, 5, 6, and 13 stand rejected under 35 U.S.C. § 112, second
paragraph, as failing to set forth the subject matter which Appellant regards
as his invention (Answer 4).
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