Base for an office chair

The ornamental design for a base for an office chair, as shown and described.

FIG. 1 is a perspective view of a base for an office chair incorporating the design of the present invention;

FIG. 2 is a top plan view of the base for an office chair;

FIG. 3 is a bottom plan view of the base for an office chair; and,

FIG. 4 is a side elevational view of the base for an office chair.

Patent	Priority	Assignee	Title
D407583,	Nov 25 1997	LEGGETT & PLATT CANADA CO SOCIETE LEGGETT & PLATT CANADA	Chair base
D413214,	Mar 31 1998	Teknion Furniture Systems Inc.	Base for a chair
D414629,	Feb 10 1998	LEGGETT & PLATT CANADA CO SOCIETE LEGGETT & PLATT CANADA	Chair base
D430982,	Feb 16 1999		Chair base
D437513,	Mar 10 2000		Chair base
D445282,	Sep 11 2000		Chair base
D448591,	Nov 16 2000	LEGGETT & PLATT CANADA CO SOCIETE LEGGETT & PLATT CANADA	Chair base
D472079,	Feb 07 2002		Chair base
D495537,	Oct 16 2003		Base stand for a seat
D540049,	Mar 31 2006	Wonderful Year Co., Ltd.	Chair
D549014,	Apr 19 2005	Donati S.p.A.	Chair base
D550988,	Aug 22 2006	True Seating Concepts, LLC	Chair base
D650615,	Jul 16 2010	LIVING STYLE B V I LTD	Chair base
D665603,	Dec 21 2009		Office chair base
ER981,

Patent	Priority	Assignee	Title
5149035,	Sep 01 1988	KNOLL, INC	Chair base and post assembly for an office chair
D273925,	Apr 21 1980	SECURITY PACIFIC BUSINESS CREDIT INC , A DE CORP	Base for a business chair
D276864,	Jan 08 1980	CASTELLI S P A	Furniture leg extension unit or similar article
D296960,	Jun 06 1986	Adamson Industrial Design Inc.	Chair
D304399,	Jul 27 1987	SHEPHERD CASTER CORPORATION	Chair base with casters
D312011,	Jul 27 1987	SHEPHERD CASTER CORPORATION	Chair base
D321299,	Aug 22 1988	SHEPHERD CASTER CORPORATION	Chair base
GB357578,

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Executed on	Assignor	Assignee	Conveyance	Frame	Reel	Doc
Mar 15 1994	PERL, LUDOVIC A	SHEPHERD PRODUCTS, INC	ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS	006921	0895	pdf
Mar 17 1994		Shepherd Products Inc.	(assignment on the face of the patent)
Jul 10 1995	SHEPHERD PRODUCTS INC	SHEPHERD PRODUCTS U S , INC	ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS	007571	0713	pdf
Sep 13 1995	SHEPHERD PRODUCTS U S IN , A DELAWARE CORP	SHEPHERD PRODUCTS INC , A CANADIAN CORPORATION	ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS	007635	0862	pdf
Dec 22 2004	SHEPHERD PRODUCTS INC	LEGGETT & PLATT CANADA CO SOCIETE LEGGETT & PLATT CANADA	ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS	015778	0038	pdf

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