HATFIELD, Associate Judge.
This is an appeal from a decision of the Board of Appeals of the United States Patent Office affirming the decision of the Primary Examiner rejecting appealed claims Nos. 1, 6, and 8 in appellant's application for the reissue of patent No. 1,828,100.
The claims read:
"(1) The method of cementing wells, which consists of: first, closing by a traveling plug, the bore of a normally substantially open well casing at a predetermined...
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