Lucent, Unions to Talk Beyond Deadline  CHICAGO (Reuters) - Lucent Technologies Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=LU.N target=/stocks/quickinfo/fullquote"&gt;LU.N&lt;/A&gt; and  unions representing roughly 10 percent of the  telecommunications equipment maker's work force said on Friday  they have agreed to extend talks a week beyond a midnight EST  Sunday contract deadline.