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						 Patent  
						   D815868  
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						 Priority  
						Feb 02 2016 
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						 Filed 
						Feb 02 2016  
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						 Issued 
						Apr 24 2018 
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						 Expiry 
						Apr 24 2033 
					   
					   						
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						 Assg.orig 
						
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						 Entity 
						unknown 
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					    12 
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					    25 
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			  The ornamental design for an office chair, as shown and described. 
			  
			  
			  
			  
			 
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FIG. 1 is a front isometric view of an office chair;
FIG. 2 is a rear isometric view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a rear elevation view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a right side elevation view thereof;
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.
The broken lines in the drawing views are included for purposes of illustrating environment and form no part of the claimed design.
	
	Romero, Francisco, Romero, Nadine
	
	
	  
 	  	 | Patent | 
	  	 Priority | 
	  	 Assignee | 
	  	 Title | 
	  
	      
	 | 10791842,  | 
	 May 26 2008 | 
	 Steelcase Inc. | 
	 Conforming back for a seating unit | 
	 
    
	 | D833767,  | 
	 Jun 01 2016 | 
	 Formway Furniture Limited | 
	 Chair | 
	 
    
	 | D846929,  | 
	 Jan 12 2016 | 
	 INTERSTUHL BUEROMOEBEL GMBH & CO  KG | 
	 Chair | 
	 
    
	 | D853768,  | 
	 Jan 12 2016 | 
	 Interstuhl Bueromoebel GmbH & Co. KG | 
	 Chair | 
	 
    
	 | D860702,  | 
	 Mar 10 2017 | 
	 FAST S P A  | 
	 Chair seat | 
	 
    
	 | D869213,  | 
	 Feb 02 2016 | 
	 OFFICE MASTER INC  | 
	 Office chair | 
	 
    
	 | D899123,  | 
	 Jun 01 2016 | 
	 Formway Furniture Limited | 
	 Chair | 
	 
    
	 | D908411,  | 
	 Sep 25 2018 | 
	  | 
	 Seatback cover | 
	 
    
	 | D911054,  | 
	 Jun 21 2019 | 
	 NINGBO MEIYING HOUSEHOLD GROUP CO , LTD  | 
	 Office chair | 
	 
    
	 | D919994,  | 
	 Apr 28 2019 | 
	  | 
	 Office chair | 
	 
    
	 | D924593,  | 
	 Dec 20 2019 | 
	  | 
	 Chair | 
	 
    
	 | D944026,  | 
	 Sep 29 2020 | 
	 NINGBO TIANDE XINYI TRADING CO , LTD  | 
	 Office chair | 
	 
	
	
	
	  
 	  	 | Patent | 
	  	 Priority | 
	  	 Assignee | 
	  	 Title | 
	  
	      
	 | 5174526,  | 
	 Nov 27 1991 | 
	 Futureflite Corporation | 
	 Adjustable lumbar support mechanism for airline passenger seats with manual push button and cable control | 
	 
    
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	 Jun 05 1998 | 
	 TEKNION FURNITURE SYSTEMS, INC  | 
	 Lumbar support adjustment mechanism | 
	 
    
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	 Sep 09 1996 | 
	 Volvo Car Corporation | 
	 Back support structure for a seat | 
	 
    
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	 Jun 20 2001 | 
	 Steelcase Inc | 
	 Compliant back for seating unit | 
	 
    
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	 Jun 20 2000 | 
	 Global Total Office | 
	 Conformable backrest for a chair | 
	 
    
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	 Mar 19 2001 | 
	 Sung Yong Co., Ltd. | 
	 Chair equipped with lumbar support unit | 
	 
    
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	 Feb 21 2004 | 
	 SANDER, ARMIN | 
	 Backrest, particularly for an office chair | 
	 
    
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	 C.R.F. Societa Consortile per Azioni | 
	 Lumbar support for a vehicle backrest | 
	 
    
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	 Vehicle seat | 
	 
    
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	 Dynamic chair back lumbar support system | 
	 
    
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	 Jul 12 2010 | 
	 Ford Global Technologies, LLC | 
	 Integrated lumbar for thin seat | 
	 
    
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	 Mar 15 2013 | 
	 HNI TECHNOLOGIES INC  | 
	 Chair with activated back flex | 
	 
    
	 | 20130154314,  | 
	  | 
	  | 
	  | 
	 
    
	 | 20150108809,  | 
	  | 
	  | 
	  | 
	 
    
	 | D456159,  | 
	 May 25 2000 | 
	 Steelcase Development Corporation | 
	 Chair | 
	 
    
	 | D456650,  | 
	 May 25 2000 | 
	 Steelcase Inc | 
	 Chair component | 
	 
    
	 | D457023,  | 
	 May 25 2000 | 
	 Steelcase Inc | 
	 Chair component | 
	 
    
	 | D471042,  | 
	 Feb 13 2002 | 
	 HERMAN MILLER, INC  | 
	 Back for a seating structure | 
	 
    
	 | D544720,  | 
	 Apr 06 2006 | 
	  | 
	 Chair | 
	 
    
	 | D575085,  | 
	 Mar 30 2008 | 
	  | 
	 Chair backrest | 
	 
    
	 | D581708,  | 
	 Apr 22 2008 | 
	  | 
	 Chair back | 
	 
    
	 | D600931,  | 
	 May 26 2008 | 
	 Steelcase Inc. | 
	 Seating unit | 
	 
    
	 | D603196,  | 
	 Jun 10 2009 | 
	  | 
	 Chair backrest | 
	 
    
	 | D627983,  | 
	 Nov 09 2009 | 
	 Kabushiki Kaisha Uchida Yoko | 
	 Chair | 
	 
    
	 | D676254,  | 
	 Jul 27 2011 | 
	 Jianhua, Yang | 
	 Office chair | 
	 
	
	
	
	
	
	  
	  	 | Date | 
	  	 Maintenance Fee Events | 
	  
	  n/a
	
	
	
	  
	  	 | Date | 
	  	 Maintenance Schedule | 
	  
	  n/a