BLAND, Associate Judge.
Claims 1 to 5, inclusive, of appellant's application for a patent relating to construction material were rejected by the Examiner, which rejection was affirmed by the Board of Appeals of the United States Patent Office. Claims 2 and 5 are regarded as illustrative, and follow:
"2. Construction material comprising a preformed sheet of bituminous material having weblike strengthening pieces incorporated therein and separated one from another...
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