Energy, Material Prices Hurt U.S. Profits  NEW YORK (Reuters) - 3M Co. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=MMM.N target=/stocks/quickinfo/fullquote"&gt;MMM.N&lt;/A&gt; and American Standard  Cos. Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=ASD.N target=/stocks/quickinfo/fullquote"&gt;ASD.N&lt;/A&gt; cast a shadow of disappointment on Monday as  the busiest week yet of the corporate earnings period got under  way, and analysts cautioned not to expect the profit picture to  brighten soon. 

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