The opinion in support of the decision being entered
today was not written for publication in a law journal
and is not binding precedent of the Board.
UNITED STATES PATENT AND TRADEMARK OFFICE
BEFORE THE BOARD OF PATENT APPEALS
AND INTERFERENCES
Ex parte PETER H. MARKUSCH and RALF GUETHER
Appeal No. 2006-0631
Application No. 10/138,539
ON BRIEF
Before KIMLIN, GARRIS and KRATZ, Administrative Patent Judges.
KIMLIN, Administrative Patent Judge.
DECISION ON APPEAL
This is an appeal from the final rejection of claims 1-29.
Claim 1 is illustrative:
1. A polyurethane/geotextile composite useful as a liner
for canals and ditches comprising a geotextile substantially
soaked with a polyurethane composition comprising:
a) a liquefied monomeric diphenylmethane diisocyanate
having a functionality of about two, a viscosity
sufficiently low that it will flow under use
conditions, a freezing point lower than 20°C, and an
isocyanate content of at least 10% by weight,
b) a polyether polyol containing from 2 to 6 hydroxyl
groups and having a number average molecular weight of
from about 250 to 8,000,
-1-
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Last modified: November 3, 2007