Application of Rene De Montmollin and Henri Riat

WORLEY, Chief Judge.

This appeal is from the decision of the Board of Appeals affirming the rejection of claims 2, 6-8, and 20 of appellants’ patent application1 for “Water Soluble

Organic Dyestuffs.”

The subject matter is reflected in the following claim:

“2. An organic dyestuff containing at least one and at most two azo groups, a sulfonic acid group and a nuclearly bound substituent of the formula

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wherein each X represents a halogen atom and n is a whole number from 1 to 2.”

It appears from the specification that azo dyestuffs possessing one or more sulfonic acid groups to impart…