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					| Patent    D667540 |  
					| Priority Dec 30 2011 |  
					| Filed Feb 21 2012 |  
					| Issued Sep 18 2012 |  
					| Expiry Sep 18 2026 |  
					|  |  
					| Assg.orig |  
					|  |  
					| Entity unknown |  
					 | 3 |  
					 | 13 |  
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						  n/a |  
						 
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			  The ornamental design for a heat pipe, as shown and described. | 
 
	
FIG. 1 is a perspective view of a heap pipe showing my design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom view thereof;
FIG. 4 is a left view thereof;
FIG. 5 is a right view thereof;
FIG. 6 is a front view thereof;
FIG. 7 is a rear view thereof;
FIG. 8 is a perspective view thereof in which the heat pipe is shown in a position of use located in a base; and,
FIG. 9 is a perspective view thereof in which the heat pipe is shown in a second position of use located in a heat sink.
The broken lines in FIGS. 8 and 9 represent environmental subject matter and form no part of the claim.
	
	Wu, Chun-Ming
	
	
	  
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