Vacuum flask

The ornamental design for a vacuum flask, as shown and described.

FIG. 1 is a front elevation view of an example embodiment of a vacuum flask showing my new design.

FIG. 2 is rear elevation view thereof.

FIG. 3 is a left side elevation view thereof.

FIG. 4 is a right side elevation view thereof.

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

Patent	Priority	Assignee	Title
D619847,	Dec 18 2009		Pot
D625947,	Oct 02 2009	SOLVENTUM INTELLECTUAL PROPERTIES COMPANY	Water pitcher
D638651,	Mar 12 2010	Hamilton Beach Brands, Inc	Beverage carafe
D669296,	Apr 05 2011	Green Lane Designs Limited	Jug
D683175,	Dec 01 2010	MEDEGEN MEDICAL PRODUCTS, LLC	Water pitcher base and lid
ER3786,
ER6209,

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Executed on	Assignor	Assignee	Conveyance	Frame	Reel	Doc
Oct 12 2005		Phoenix Vacuum Flask Company, Ltd.	(assignment on the face of the patent)
Dec 22 2005	HUANG, TEH-HSIUNG FRANK	PHOENIX VACUUM FLASK COMPANY, LTD	ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS	017640	0381	pdf

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