Appeal No. 2000-0051 Page 4
Application No. 08/545,629
product of the latter step and subsequently the step of blending
water therewith (claim 10, steps a-c).
The examiner acknowledges that Renk does not disclose the
use of a solvent for a water dispersible or water soluble polyol.
Consequently, Renk does not disclose appellants’ concentrating
step. According to the examiner (answer, page 3),
the use of solvents to dissolve such resins, as
polyesters, prior to their emulsification, by means of
external emulsifiers, within water was a known and
conventional technique at the time of the invention.
This position is supported by the teachings of Mallonee
at column 2, lines 13-21; column 3, lines 6-53; and
column 4, lines 23+.
Renk is directed to producing a two component coating
composition, one of which components is a polyol containing
component, which polyol component may be water soluble or
dispersible in the presence of an emulsifier. Mallonee (column
1, lines 60-69 and column 2, lines 5-13) is concerned with chain
extension of addition products of a stoichiometric excess of
organic diisocyanate with organic high molecular weight compounds
having terminal active hydrogens and forming stable latices of
the chain-extended products. Mallonee (column 2, lines 13-21,
column 4, lines 26-31) teaches that when his addition product is
too viscous, it can be diluted with an inert organic solvent.
While the polyol of Renk (column 5, lines 1-45 and column 6, line
Page: Previous 1 2 3 4 5 6 7 8 9 Next
Last modified: November 3, 2007