Appeal No. 94-1550
Application 07/893,662
presence of a substantial amount of polyurethane. In support of
this argument, appellant refers to the file wrapper of the
Dessaint patent in which the Dessaint invention was characterized
as containing four “essential” constituents inclusive of a
polyurethane component. This argument was apparently made in
that prosecution to distinguish the Dessaint claims from the
disclosure of U.S. Patent No. 4,366,300 to Delescluse. See the
letter attached as Appendix II to appellant’s Brief.
Like Dessaint, Delescluse also discloses a formulation which
includes a fluorinated acrylic copolymer in an organic solvent
used to protect construction materials against spotting or
staining, for example, from unlicensed bill-sticking and
projections or spraying of liquid paints (i.e., graffiti). See
Dessaint at column 1, lines 6-20. More specifically, Delescluse
teaches that the protection may be provided against deposits or
stains from atmospheric dust with eventual development of
vegetative mosses (column 1, lines 14-16). Importantly,
Delescluse further teaches that if it is desired to increase the
fungal or bactericidal protection of such materials,
anticryptogamic agents (agents which exhibit fungistatic or
fungicidal action) or bactericides may be incorporated into such
7
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 Next
Last modified: November 3, 2007