Interference No. 104,522 Paper108
Nichols v. Tabakoff Page 46
0
/ R'
x H \ N AN
OR'
N
U
a tautomer thereof, a pharmacologically acceptable ester, amide, salt, ether, or an acid
addition salt thereof;
wherein R1 represents hydrogen or an alkyl group of 1 to 3 carbon atoms;
R 2 and R' each independently represent phenyl which may be unsubstituted or
alkoxy substituted one or more times with alkoxy containing 1 to 3 carbon atoms,
wherein each of the R 2 and R 3 substituents can be the same or different; and
X represents halogen and each of the 5, 7 substituents can be the same or
different.
95. Tabakoff claim 13 specifies that each X is chloro, R1 is hydrogen, and R 2 and R 3
are each phenyl. Tabakoff claim 14 specifies that each X is chloro, R1 is a 1 to 3
carbon atom alkyl group, and R 2 and R 3 are each phenyl. Tabakoff claim 15 specifies
that each X is chloro, R1 is hydrogen, one of R 2 and R 3 is an unsubstituted phenyl and
the other is a phenyl having a 1 to 3 carbon atom alkoxy substituent.
96. Tabakoff claim 11 limits the compound of claim 12 to (NN-diphenyl)-4-ureido-
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