LEVENTHAL, Circuit Judge.
Appellant applied for a patent for a chemical process for preparing linear polyamides (a chemical designation that includes nylon). On June 12, 1964, after the critical claims, 11-17, were finally rejected by the examiner in the Patent Office, appellant filed an appeal in the Board of Appeals. Thereafter he filed several amendments to the patent claims. The examiner accepted some amendments but refused to enter one filed on November 25, 1964...
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