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						Patent
 
						   D623450
 
					 
				 
				
					
						Priority
 
						Aug 05 2008
					 
				 
				
					
						Filed
						Feb 04 2009
 
					 
				 
				
					
						Issued
						Sep 14 2010
					 
				 
				
					
						Expiry
						Sep 14 2024
					   
					   						
					 
				 
				
					
						
						
					 
				 
				
					
						Assg.orig
						
					 
				 
				
					
						
						
					 
				 
				
					
						Entity
						unknown
					 
				 
				
					 
						
					   0
					  
				 
				
					 
						
					   14
					  
				 
				
					 
						
					   
						  n/a
					   
					  
				 
				
						 
    
     
     
     
				
				
			
		   
		 
			
			  
			  
			  
			  
			  I claim the ornamental design for a collapsible foundation core for mattress, as shown and described.
			  
			 
		 
	 
 
	
FIG. 1  is a perspective view of my design for a collapsible foundation core for mattress;
FIG. 2  is a top plan view thereof;
FIG. 3  is a bottom plan view thereof;
FIG. 4  is an elevated front view thereof;
FIG. 5  is an elevated back view thereof;
FIG. 6  is an elevated right side view thereof; and,
FIG. 7  is an elevated left side view thereof.
 
	
	Mantzis, George 
	
	
	  
 	  	 Patent 
	  	 Priority 
	  	 Assignee 
	  	 Title 
	   
	  
	
	
	
	  
 	  	 Patent 
	  	 Priority 
	  	 Assignee 
	  	 Title 
	   
	      
	 4100631 ,  
	 May 13 1976 
	  
	 Box-spring assembly 
	  
    
	 4236262 ,  
	 Jan 31 1979 
	 Spiller Spring Company  
	 Support grid and spring unit for a box spring foundation unit 
	  
    
	 4377279 ,  
	 Jul 07 1980 
	 Steadley Company  
	 Steel wire foundation 
	  
    
	 4771995 ,  
	 Apr 15 1987 
	 Leggett & Platt, Incorporated  
	 Collapsible box spring 
	  
    
	 4867424 ,  
	 Sep 23 1988 
	 L&P Property Management Company  
	 Box spring with wire columns and partial coils 
	  
    
	 5052064 ,  
	 Dec 18 1990 
	 Leggett & Platt Incorporated  
	 Stackable bedding foundation 
	  
    
	 6108834 ,  
	 Mar 13 1997 
	 International Sleep Creations, Inc.  
	 Unitary body bedding foundation 
	  
    
	 6578213 ,  
	 Dec 08 2000 
	 L&P Property Management Company  
	 Stackable bedding foundation 
	  
    
	 6651276 ,  
	 Aug 10 2001 
	 Hickory Springs Manufacturing Company  
	 Floating slat frame for a mattress foundation 
	  
    
	 20030028963 ,  
	  
	  
	  
	  
    
	 20050251911 ,  
	  
	  
	  
	  
    
	 20060123541 ,  
	  
	  
	  
	  
    
	 20060156470 ,  
	  
	  
	  
	  
    
	 D544284 ,  
	 Oct 11 2005 
	  
	 Mattress frame 
	  
	
	
	
	
	
	  
	  	 Date 
	  	 Maintenance Fee Events 
	   
	  n/a
	
	
	
	  
	  	 Date 
	  	 Maintenance Schedule 
	   
	  n/a