Appeal No. 1997-4434
Application No. 08/189,053
Claims 1, 3 through 6, 8, 13 through 15 and 17 stand
rejected under 35 U.S.C. § 103 as unpatentable over the
disclosure of Columbus.
We reverse.
The claimed subject matter is directed to a surfactant, a
method of preparing the surfactant and a stable tackifier
dispersion containing the surfactant. The novelty of the
claimed subject matter hinges on a compound which is used as
the claimed surfactant. According to claim 1, the surfactant
is such that it must be useful for “forming stable dispersions
of rosin esters compatible with elastomeric latexes”. The
surfactant comprises a compound having a formula R -R -R ,1 2 3
1 3
wherein at least one of R and R is a rosin ester and wherein
R contains at least one polyethylene glycol having a2
molecular weight of 1500 to 20,000. The surfactant is
substantially solid at room temperature.
As evidence of obviousness of the claimed subject matter
under 35 U.S.C. § 103, the examiner appears to rely on column
8,
3
Page: Previous 1 2 3 4 5 6 7 8 9 Next
Last modified: November 3, 2007