Appeal No. 1999-1279
Application 08/802,294
illustrative and is appended to this decision.
THE REFERENCES
Baack et al. (Baack) 4,242,468 Dec. 30,
1980
Nissen et al. (Nissen) 4,383,050 May 10,
1983
St. Clair 5,486,570 Jan. 23,
1996
THE REJECTIONS
Claims 1-19 stand rejected under 35 U.S.C. § 103 as being
unpatentable over St. Clair in view of Baack and Nissen.
OPINION
We reverse the aforementioned rejection.
St. Clair discloses a polyurethane sealant or adhesive
made by reacting an aliphatic or aromatic polyisocyanate and a
saturated polyhydroxylated polydiene which preferably has two
hydroxyl groups, one on each end of the polymer (col. 1,
lines 34-49; col. 3, lines 46-48). Suitable peak molecular
weights for a di-hydroxy polydiene polymer are between 1,000
and 40,000 (col. 5, lines 3-5). It is not disputed that
St. Clair’s polyisocyanate and di-hydroxylated polydiene
polymer fall within the scope of, respectively, components (I)
and (iii) in the appellants’ claim 1.
2
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