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APPLICATION OF MacLEAN

Patent Appeal No. 8580.

454 F.2d 756 (1972)

Application of Alexander F. MacLEAN and Adin L. Stautzenberger.

United States Court of Customs and Patent Appeals.

February 10, 1972.

Attorney(s) appearing for the Case

Marvin Turken, New York City, attorney of record, for appellants.

S. Wm. Cochran, Washington, D. C., for the Commissioner of Patents. Fred W. Sherling, Washington, D. C., of counsel.

Before WORLEY, Chief Judge, and RICH, ALMOND, BALDWIN, and LANE, Judges.

WORLEY, Chief Judge.

The issues here are whether the Board of Appeals erred in affirming the examiner's various rejections of claims 1-61 under 35 U.S.C. §§ 102, 103 and 112.

The invention relates to a method of separating acetonitrile impurity from acrylonitrile by a process of extractive distillation employing water as the extractant. Appellants' brief contains the following discussion of the problem extant in the prior...

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