MARTIN, Judge.
This appeal is from a decision of the Board of Appeals of the United States Patent Office affirming the examiner's rejection of claims 1 through 8 of appellant's application, serial No. 676,850, filed August 7, 1957, for Plastic Pipe as unpatentable over the prior art. No claims are allowed.
The application discloses a pipe made up of two concentric layers of a plastic material, such as polyethylene. The pipe is described as comprising an inner...
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